[Al-Bukhari].

The Prophet (saws) said: The flourishing state of Jerusalem will be when Yathrib is in ruins, the ruined state of Yathrib will be when the great war comes, the outbreak of the great war will be at the conquest of Constantinople and the conquest of Constantinople when the Dajjal (Antichrist) comes forth. He (the Prophet) struck his thigh or his shoulder with his hand and said: This is as true as you are here or as you are sitting (meaning Mu'adh ibn Jabal).

Abu Dawud said: In this way Hashim al-dastawa’I transmitted it from Qatadah, but he said : “If anyone memorizes the closing verses of surat al-Kahf.” Shu’bah narrated from Qatadah the words “from the end of al-Kahf.

Yahya related to me from Malik from Nuaym ibn Abdullah al-Mujmir that Abu Hurayra said, "The Messenger of Allah, may Allah bless him and grant him peace, said, 'There are angels at the entries of Madina, and neither plague nor the Dajjal will enter it.' "

Umar and a group of the companions of the Prophet set out with the Prophet to Ibn Saiyad. He found him playing with some boys near the hillocks of Bani Maghala. Ibn Saiyad at that time was nearing his puberty. He did not notice (the Prophet's presence) till the Prophet stroked him on the back with his hand and said, "Ibn Saiyad! Do you testify that I am Allah's Apostle?" Ibn Saiyad looked at him and said, "I testify that you are the Apostle of the illiterates."

Then Ibn Saiyad asked the Prophet. "Do you testify that I am the apostle of Allah?" The Prophet said to him, "I believe in Allah and His Apostles." Then the Prophet said (to Ibn Saiyad). "What do you see?" Ibn Saiyad replied, "True people and false ones visit me." The Prophet said, "Your mind is confused as to this matter." The Prophet added, " I have kept something (in my mind) for you." Ibn Saiyad said, "It is Ad-Dukh." The Prophet said (to him), "Shame be on you! You cannot cross your limits." On that 'Umar said, "O Allah's Apostle! Allow me to chop his head off." The Prophet said, "If he should be him (i.e. Ad-Dajjal) then you cannot overpower him, and should he not be him, then you are not going to benefit by murdering him."

The Prophet (saws) said: I have told you so much about the Dajjal (Antichrist) that I am afraid you may not understand. The Antichrist is short, hen-toed, woolly-haired, one-eyed, an eye-sightless, and neither protruding nor deep-seated. If you are confused about him, know that your Lord is not one-eyed.

Abu Dawud said: 'Amr bin Al-Aswad was appointed a judge.

`Umar bin Al-Khattab set out with Allah's Apostle, and a group of his companions to Ibn Saiyad. They found him playing with the boys in the fort or near the Hillocks of Bani Maghala. Ibn Saiyad was nearing his puberty at that time, and he did not notice the arrival of the Prophet till Allah's Apostle stroked him on the back with his hand and said, "Do you testify that I am Allah's Apostle?" Ibn Saiyad looked at him and said, "I testify that you are the Apostle of the unlettered ones (illiterates)". Then Ibn Saiyad said to the Prophets . "Do you testify that I am Allah's Apostle?" The Prophet denied that, saying, "I believe in Allah and all His Apostles," and then said to Ibn Saiyad, "What do you see?" Ibn Saiyad said, "True people and liars visit me." The Prophet said, "You have been confused as to this matter." Allah's Apostle added, "I have kept something for you (in my mind)." Ibn Saiyad said, "Ad-Dukh." The Prophet said, "Ikhsa (you should be ashamed) for you can not cross your limits." `Umar said, "O Allah's Apostle! Allow me to chop off h is neck." Allah's Apostle said (to `Umar). "Should this person be him (i.e. Ad-Dajjal) then you cannot over-power him; and should he be someone else, then it will be no use your killing him." `Abdullah bin `Umar added: Later on Allah's Apostle and Ubai bin Ka`b Al-Ansari (once again) went to the garden in which Ibn Saiyad was present. When Allah's Apostle entered the garden, he started hiding behind the trunks of the date-palms intending to hear something from Ibn Saiyad before the latter could see him. Ibn Saiyad was Lying on his bed, covered with a velvet sheet from where his mumur were heard. Ibn Saiyad's mother saw the Prophet and said, "O Saf (the nickname of Ibn Saiyad)! Here is Muhammad!" Ibn Saiyad stopped his murmuring. The Prophet said, "If his mother had kept quiet, then I would have learnt more about him." `Abdullah added: Allah's Apostle stood up before the people (delivering a sermon), and after praising and glorifying Allah as He deserved, he mentioned the Ad-Dajjal saying, "I warn you against him, and there has been no prophet but warned his followers against him. Noah warned his followers against him but I am telling you about him, something which no prophet has told his people of, and that is: Know that he is blind in one eye where as Allah is not so."

I heard the Prophet (saws) 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 Messenger of Allah (saws) described him to us, saying: Perhaps some who have seen me and heard my words will live till his time. The people asked: Messenger of Allah! what will be the condition of our hearts on that day? Like what we are today? He replied: Or better.