It is narrated from Hazrat Abu Saeed Khudri (may Allah be pleased with him) that once the Prophet (peace and blessings be upon him) narrated to us a lengthy hadith regarding the Dajjal. In it, the Prophet (peace and blessings be upon him) also said that the Dajjal will come towards Madinah Munawwarah, but it will be forbidden for him to enter from any of the entrances of Madinah Munawwarah. On that day, a man will go out towards him who will be the best among all people, and he will say, "Tell me, if I kill him and bring him back to life, will you have any doubt about this matter?" The people will say, "No." So he will kill him and bring him back to life. That man will say, "By Allah! I did not have as much insight about your matter as I have now." The Dajjal, enraged, will want to kill him again, but this time he will not be given the power to do so.