Ibn `Abbas reported the Prophet as saying, "On the night when I was taken up to heaven I saw Moses, a dark, tall, curly-headed man, looking as though he were one of the men of Shanu'a. I saw Jesus, a man of medium height, reddish fair, with long hair. And I saw Malik, the guardian of hell, and the dajjal (with signs which God showed him) *. Now do not be in doubt about meeting him."
*The phrase in brackets is an insertion by the transmitter who tells that God showed Muhammad miracles which the dajjal will perform
(Bukhari and Muslim.)