About the Prophet’s (pbuh) warning of the Dajjal with more information than all the preceding Prophets (pbut) – that Dajjal is one-eyed;

Sahih Bukhari

004.055.553 – Narrated Ibn Umar:

Once Allah’s Apostle stood amongst the people, glorified and praised Allah as He deserved and then mentioned the Dajjal saying, “l warn you against him (i.e. the Dajjal) and there was no prophet but warned his nation against him. No doubt, Noah warned his nation against him but I tell you about him something of which no prophet told his nation before me. You should know that he is one-eyed, and Allah is not one-eyed.”

About the Prophet’s (pbuh) warning of the Dajjal with more info than all the preceding Prophets (pbut) – that Dajjal will have a Paradise and Hell with him;

Sahih Bukhari

004.055.554 – Narrated Abu Huraira:

Allah’s Apostle said, “Shall I not tell you about the Dajjal a story of which no prophet told his nation? The Dajjall is one-eyed and will bring with him what will resemble Hell and Paradise, and what he will call Paradise will be actually Hell; so I warn you (against him) as Noah warned his nation against him.”

The Prophet’s (pbuh) description of his dream seeing Isaa (a.s) and Dajjal at the Kabah;

Sahih Bukhari

001.0327 – ‘Abdullah reported on the authority of his father ‘Umar b. Khattab that he heard from the Messenger of Allah (may peace he upon him) say: I was sleeping when I saw myself making circuit around the Ka’bah, and I saw there a man of fair complexion with straight hair between two men. Water was flowing from his head or water was falling from his head. I said: Who is he? They answered: He is the son of Mary. Then I moved forward and cast a glance and there was a bulky man of red complexion with thick locks of hair on his head, blind of one eye as if his eye was a swollen grape. I asked: Who is he? They said: He is Dajjal. He had close resemblance with Ibn Qatan amongst men.

The insignificance of Dajjal in the sight of Allah;

Sahih Muslim

025.5352 – Mughira b. Shu’ba reported that none else had asked more questions from Allah’s Messenger (may peace be upon him) about the Dajjal than I, but he simply said in a slight mood): O, my son, why are you worried because of him? He will not harm you. I said: The people think that he would have with him rivers of water and mountains of bread, whereupon he said: He would be more insignificant in the sight of Allah than all these things (belonging to him).

041.7020 – Mughira b. Shu’ba reported: No one asked Allah’s Messenger (may peace be upon him) more about Dajjil than I asked him. He said: He should not be a source of worry to you for he would not be able to do any harm to you. I said: Allah’s Messenger, it is alleged that he would have along with him (abundance of) food and water. Thereupon he said: He would be very insignificant in the eye of Allah (even) with all this.

041.7021 – Mughira b. Shu’ba reported that none asked Allah’s Apostle (may peace be upon him) about Dajjal more than I asked him. I (one of the narrators other than Mughlra b. Shu’ba) said: What’did you ask? Mughira replied: I said that the people alleged that he would have a mountain load of bread and mutton and rivers of water. Thereupon he said: He would be more insignificant in the eye of Allah compared with all this.

This is a detailed narration describing almost every event to take place from the appearance of Dajjal, his death, Dog & Magogg, their death, to the last moments of the Last Hour;

Sahih Muslim

041.7015 – An-Nawwas b. Sam’an reported that Allah’s Messenger (may peace be upon him) made a mention of the Dajjal one day in the morning. He sometimes described him to be 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) in our faces, he said: What is the matter with you? We said: Allah’s Messenger, you made a mention of the Dajjal in the morning (sometimes describing him) to be insignificant and sometimes very important, until we began to think as if he were present in some (near) part of the cluster of the date palm trees. Thereupon 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 on, I shall contend with him on your behalf, but if he comes forth while I am not amongst you, a man must contend on his own behalf and Allah would take care of every Muslim on my behalf (and safeguard him against his evil). He (Dajjal) would be a young man with twisted, contracted hair, and a blind eye. I compare him to ‘Abd-ul-‘Uzza b. Qatan. He who amongst you would survive to see him should recite over him the opening verses of Sura Kahf (xviii.). He would appear on the way between Syria and Iraq and would spread mischief right and left. O servant of Allah! adhere (to the path of Truth). We said: Allah’s Messenger, how long would he stay on the earth? He said.. For forty days, one day like a year and one day like a month and one day like a week and the rest of the days would be like your days. We said: Allah’s Messenger, would one day’s prayer suffice for the prayers of a day equal to one year? Thereupon he said: No, but you must make an estimate of time (and then observe prayer). We said: Allah’s Messenger, how quickly would he walk upon the earth? Thereupon he said: Like cloud driven by the wind. He would come to the people and invite them (to a wrong religion) and they would affirm their faith in him and respond to him. He would then give command to the sky and there would be rainfall upon the earth and it would grow crops. Then in the evening, their posturing animals would come to them with their humps very high and their udders full of milk and their flanks stretched. He would then come to another people and invite them. But they would reject him and he would go away from them and there would be drought for them and nothing would be left with them in the form of wealth.

He would then walk through the waste, land and say to it: Bring forth your treasures, and the treasures would come out and collect (themselves) before him like the swarm of bees. He would then call a person brimming with youth and strike him with the sword and cut him into two pieces and (make these pieces lie at a distance which is generally) between the archer and his target. He would then call (that young man) and he will come forward laughing with his face gleaming (with happiness) and it would at this very time that Allah would send Christ, son of Mary, and he will descend at the white minaret in the eastern side of Damscus wearing two garments lightly dyed with saffron and placing his hands on the wings of two Angels. When he would lower his head, there would fall beads of perspiration from his head, and when he would raise it up, beads like pearls would scatter from it. Every non-believer who would smell the odour of his self would die and his breath would reach as far as he would be able to see. He would then search for him (Dajjal) until he would catch hold of him at the gate of Ludd and would kill him. Then a people whom Allah had protected would come to Jesus, son of Mary, and he would wipe their faces and would inform them of their ranks in Paradise and it would be under such conditions that Allah would reveal to Jesus these words: I have brought forth from amongst My servants such people against whom none would be able to fight; you take these people safely to Tur, and then Allah would send Gog and Magog and they would swarm down from every slope. The first of them would pass the lake of Tibering and drink out of it. And when the last of them would pass, he would say: There was once water there. Jesus and his companions would then be besieged here (at Tur, and they would be so much hard pressed) that the head of the ox would be dearer to them than one hundred dinars and Allah’s Apostle, Jesus, and his companions would supplicate Allah, Who would send to them insects (which would attack their necks) and in the morning they would perish like one single person. Allah’s Apostle, Jesus, and his companions would then come down to the earth and they would not find in the earth as much space as a single span which is not filled with their putrefaction and stench. Allah’s Apostle, Jesus, and his companions would then again beseech Allah, Who would send birds whose necks would be like those of bactrin camels and they would carry them and throw them where God would will.

Then Allah would send rain which no house of clay or (the tent of) camels’ hairs would keep out and it would wash away the earth until it could appear to be a mirror. Then the earth would be told to bring forth its fruit and restore its blessing and, as a result thereof, there would grow (such a big) pomegranate that a group of persons would be able to eat that, and seek shelter under its skin and milch cow would give so much milk that a whole party would be able to drink it. And the milch camel would give such (a large quantity of) milk that the whole tribe would be able to drink out of that and the milch sheep would give so much milk that the whole family would be able to drink out of that and at that time Allah would send a pleasant wind which would soothe (people) even under their armpits, and would take the life of every Muslim and only the wicked would survive who would commit adultery like asses and the Last Hour would come to them.

About the warning of Dajjal’s appearance when the ummah may be in a better condition by then;

Sunan Abu Dawud

040.4738 – Narrated AbuUbaydah ibn al-Jarrah:

I heard the Prophet (peace be upon him) say: There has been no Prophet after Noah who has not warned his people about the antichrist (Dajjal), and I warn you of him. The Apostle of Allah (peace be upon him) described him to us, saying: Perhaps some who have seen me and heard my words will live till his time. The people asked: Apostle of Allah! what will be the condition of our hearts on that day? Like what we are today? He replied: Or better.