Dajjal cannot enter Medina
Hadith - Bukhari 9.245, Narrated Abu Said
One day Allah's Apostle narrated to us a long narration about Ad-Dajjal and among the things he narrated to us, was: "Ad-Dajjal will come, and he will be forbidden to enter the mountain passes of Medina. He will encamp in one of the salt areas neighboring Medina and there will appear to him a man who will be the best or one of the best of the people. He will say 'I testify that you are Ad-Dajjal whose story Allah's Apostle has told us.' Ad-Dajjal will say (to his audience), 'Look, if I kill this man and then give him life, will you have any doubt about my claim?' They will reply, 'No,' Then Ad-Dajjal will kill that man and then will make him alive. The man will say, 'By Allah, now I recognize you more than ever!' Ad-Dajjal will then try to kill him (again) but he will not be given the power to do so."
Hadith - Bukhari 9.247, Narrated Huraira
Allah's Apostle said, "There are angels at the mountain passes of Medina (so that) neither plague nor Ad-Dajjal can enter it."
Hadith - Bukhari 9.239, Narrated Anas bin Malik
The Prophet said, "Ad-Dajjal will come and encamp at a place close to Medina and then Medina will shake thrice whereupon every Kafir (disbeliever) and hypocrite will go out (of Medina) towards him."
Dajjal is One-Eyed
Hadith - Bukhari 9.241, Narrated Abdullah ibn Umar
Allah's Apostle stood up amongst the people and then praised and glorified Allah as He deserved and then he mentioned Ad-Dajjal, saying, "I warn you of him, and there was no prophet but warned his followers of him; but I will tell you something about him which no prophet has told his followers: Ad-Dajjal is one-eyed whereas Allah is not."
Hadith - Bukhari 9.504, Narrated Abdullah
Ad-Dajjal was mentioned in the presence of the Prophet . The Prophet said, "Allah is not hidden from you; He is not one-eyed," and pointed with his hand towards his eye, adding, "While Al-Masih Ad-Dajjal is blind in the right eye and his eye looks like a protruding grape."
Hadith - Bukhari 9.245, Narrated Anas
The Prophet said, "No prophet was sent but that he warned his followers against the one-eyed liar (Ad-Dajjal). Beware! He is blind in one eye, and your Lord is not so, and there will be written between his (Ad-Dajjal's) eyes (the word) Kafir (i.e., disbeliever)." (This Hadith is also quoted by Abu Huraira and Ibn 'Abbas).
Hadith - Bukhari 9.237, Narrated Abu Huraira
Allah's Apostle said, "The Hour will not be established
(1) till two big groups fight each other whereupon there will be a great number of casualties on both sides and they will be following one and the same religious doctrine,
(2) till about thirty Dajjals (liars) appear, and each one of them will claim that he is Allah's Apostle,
(3) till the religious knowledge is taken away (by the death of religious scholars)
(4) earthquakes will increase in number
(5) time will pass quickly,
(6) afflictions will appear,
(7) Al-Harj, (i.e., killing) will increase,
(8) till wealth will be in abundance--so abundant that a wealthy person will worry lest nobody should accept his Zakat, and whenever he will present it to someone, that person (to whom it will be offered) will say, 'I am not in need of it,'
(9) till the people compete with one another in constructing high buildings,
(10) till a man when passing by a grave of someone will say, 'Would that I were in his place,'
(11) and till the sun rises from the West.
So when the sun will rise and the people will see it (rising from the West) they will all believe (embrace Islam) but that will be the time when: (As Allah said,) 'No good will it do to a soul to believe then, if it believed not before, nor earned good (by deeds of righteousness) through its Faith.' (6.158) And the Hour will be established while two men spreading a garment in front of them but they will not be able to sell it, nor fold it up; and the Hour will be established when a man has milked his she-camel and has taken away the milk but he will not be able to drink it; and the Hour will be established before a man repairing a tank (for his livestock) is able to water (his animals) in it; and the Hour will be established when a person has raised a morsel (of food) to his mouth but will not be able to eat it."
Hadith - Muslim #7015, Narrated An-Nawwas ibn Sam'an
Allah's Apostle mentioned of the Dajjal one day in the morning. He sometimes described him as insignificant and sometimes described (his turmoil) as very significant (and we felt) as if he were in the cluster of the date-palm trees. When we went to him (to the Holy Prophet) in the evening and he read (the signs of fear) on our faces, he said: What is the matter with you?
We said: Allah's Apostle you mentioned the Dajjal this morning (sometimes describing him) as insignificant and sometimes very important, until we began to think he was present in some (nearly) part of the cluster of the date-palm trees.
So he said: I harbour fear in regard to you in so many other things besides the Dajjal. If he comes forth while I am among you, I shall contend with him on your behalf, but if he comes forth while I am not among you, a man must contend on his own behalf and Allah will take care of every Muslim on my behalf (and safeguard him against his evil). He (the Dajjal) will be a young man with twisted, cropped hair, and a blind eye. I compare him with AbdulUzza ibn Qatan. He who among you will survive to see him should recite over him the opening verses of Surah al-Kahf (xviii). He will appear on the way between Syria and Iraq and will spread mischief right and left. O servant of Allah! Adhere (to the path of Truth).
We said: Allah's Apostle , how long will he stay on Earth?
He said: For forty days, one day like a year, one day like a month, one day like a week, and the rest of the days will be like your days.
We said: Allah's Apostle will one day's prayer suffice for the prayers of the day equal to one year?
Thereupon he said: No, but you must make an estimate of the time (and then observe prayer).
We said: Allah's apostle how quickly will he walk upon the earth?
Thereupon he said: Like cloud driven by the wind. He will come to the people and invite them (to a wrong religion); they will affirm their faith in him and respond to him. He will then give a command to the sky: there will be rainfall upon the Earth and it will grow crops. Then in the evening, their pasturing animals will come to them with their humps very high, their udders full of milk and their flanks distended. He will then come to another people and invite them. But they will reject him so he will go away from them; they will have a drought and nothing will be left with them in the form of wealth. He will then walk through the desert and say to it: Bring forth your treasures. The treasures will come out and gather before him like a swarm of bees. He will then call someone in the flush of youth, strike him with the sword, cut him into two pieces and (make these pieces lie at the distance which is generally between the archer and his target. He will then call (that young man) and he will come forward laughing with his face gleaming (with happiness).
It will at this very time that Allah will send Christ, son of Mary. He will descend at the white minaret on the eastern side of Damascus, wearing two garments lightly dyed with saffron and placing his hands on the wings of two Angels. When he lowers his head, there will fall beads of perspiration from his head, and when he raises it up, beads like pearls will scatter from it. Every non-believer who smells the odour of his body will die and his breath will reach as far as he is able to see. He will then search for him (Dajjal) until he catches hold of him at the gate of Ludd and kills him. Then a people whom Allah had protected will come to Jesus, son of Mary, and he will wipe their faces and inform them of their ranks in Paradise. It will be under such conditions that Allah will reveal to Jesus these words: I have brought forth from among My servants such people against whom none will be able to fight; you take these people safely to Tur, and then Allah will send Gog and Magog and they will swarm down from every slope. The first of them will pass the lake of Tiberias and drink out of it. And when the last of them passes, he will say: There was once water there.
Jesus and his companions will then be besieged here (at Tur, and they will be so hard pressed) that the head of the ox will be dearer to them than one hundred dinars. Allah's Apostle , Jesus, and his companions will supplicate Allah, Who will send to them insects (which will attack their necks) and in the morning they would perish as one single person. Allah's Apostle , Jesus, and his companions, then come down to Earth and they will not find on Earth as much space as a single span that is not filled with putrefaction and stench. Allah's Apostle , Jesus, and his companions will then beseech Allah who will send birds whose necks would be like those of Bactrian camels and they will carry them away and throw them where Allah wills.
Then Allah will send rain which no house of mud-bricks or (tent of) camel-hair will keep out and it will wash the Earth until it resembles a mirror. Then the Earth will be told to bring forth its fruit and restore its blessing and, as a result thereof, there will grow (such a big) pomegranate that a group of people will be able to eat it and seek shelter under its skin, a dairy cow will give so much milk that a whole party will be able to drink it. The milking camel will give such (a large quantity of) milk that the whole tribe will be able to drink from it, and the milking-sheep will give so much milk that the whole family will be able to drink from it. At that time Allah will send a pleasant wind which will soothe (people) even under their armpits. He will take the life of every Muslim and only the wicked will survive who will commit adultery like asses and the Last Hour would come to them.
Hadith - Abu Dawood #4305, Narrated Imran ibn Husayn
The Prophet said: Let him who hears of the Dajjal (Antichrist) go far from him for I swear by Allah that a man will come to him thinking he is a believer and follow him because of confused ideas roused in him by him.
Conquest of Constantinople
Hadith - Abu Dawood #4283, Narrated Abdullah ibn Busr
The Prophet said: The time between the great war and the conquest of the city (Constantinople) will be six years, and the Dajjal (Antichrist) will come forth in the seventh.
Hadith - Abu Dawood #4282, Narrated Mu'adh ibn Jabal
The Prophet said: The greatest war, the conquest of Constantinople and the coming forth of the Dajjal (Antichrist) will take place within a period of seven months.
Reward from Allah for being the Dajjal's enemy
Hadith - Abu Dawood #4232, Narrated Hudhayfah ibn al-Yaman
Then the Antichrist (Dajjal) will come forth accompanied by a river and fire. He who falls into his fire will certainly receive his reward, and have his load taken off him, but he who falls into his river will have his load retained and his reward taken off him. I then asked: What will come next? He said: The Last Hour will come.
Protection from the Trial of the Dajjal
Hadith - Al-Tirmidhi #2146, Narrated AbudDarda'
Allah's Messenger said, "He who recites three verses at the beginning of al-Kahf will be protected from the trial of the Dajjal."
[Tirmidhi transmitted it, saying this is a hasan sahih tradition.]
Hadith - Muslim #7034, Narrated Anas ibn Malik
Allah's Apostle said: The Dajjal would be followed by seventy thousand Jews of Isfahan wearing Persian shawls.
Hadith - Muslim #7025, Narrated Abdullah ibn Amr ibn al-'As
I committed to memory a hadith from Allah's Apostle and I did not forget it after I had heard Allah's Apostle said: The first sign (out of the signs of the appearance of the Dajjal) would be the appearance of the sun from the west, the appearance of the beast before the people in the forenoon and which of the two happens first, the second one would follow immediately after that.
Dajjal will Perish
Hadith - Muslim #3187, Narrated AbuHurayrah
Allah's Messenger said: Dajjal will come from the eastern side with the intention of attacking Medina until he will get down behind Uhud. Then the angels will turn his face towards Syria and there he will perish.
Hadith - Muslim #6924, Narrated AbuHurayrah
Allah's Apostle said: The Last Hour will not come until the Romans land at al-A'maq or in Dabiq. An army consisting of the best (soldiers) of the people on Earth at that time will come from Medina (to oppose them). When they arrange themselves in ranks, the Romans will say: Do not stand between us and those (Muslims) who took prisoners from among us. Let us fight them. The Muslims will say: Nay, by Allah, we shall never turn aside from you and from our brethren so that you may fight them. They will then fight and a third (part) of the army, whom Allah will never forgive, will run away. A third (part of the army), which will be constituted of excellent martyrs in Allah's eyes, would be killed. The third who will never be put on trial will win and they will be the conquerors of Constantinople. As they are busy in distributing the spoils of war (amongst themselves) after hanging their swords by the olive trees, Satan will cry: The Dajjal has taken your place among your families. They will then come out, but it will be of no avail. When they reach Syria, he will come out while they are still preparing themselves for battle, drawing up the ranks. Certainly, the time of prayer will come and then Jesus (peace be upon him), son of Mary, descend and will lead them in prayer. When the enemy of Allah see him, it will (disappear) just as salt dissolves in water and if he (Jesus) were not to confront them at all, even then it would dissolve completely. Allah would kill them by his hand and he would show them their blood on his lance (the lance of Jesus Christ).