Musnad Abu Ya'la al-Mawsili 154:76

Jabara ibn Mughallis narrated to us, Ubayd Allah ibn Iyad ibn Laqit narrated to us, from his father, from Abd al-Rahman ibn Nu'aym al-A'raj, who said: A man asked Ibn Umar about temporary marriage (mut'ah) of women while I was with him. He became angry and said: "We were not, during the time of the Messenger of Allah (peace and blessings of Allah be upon him), adulterers nor fornicators." Then he said: "By Allah, I heard the Messenger of Allah (peace and blessings of Allah be upon him) say: 'There will certainly be, before the Day of Resurrection, the False Messiah (al-Masih al-Dajjal) and thirty liars, or more than that.'"