Abu Dawud Book 31, Hadith Number 4267.
Chapter : Yellow dye.
Narated By Jabir ibn Samurah : I heard the Apostle of Allah (PBUH) say: This religion will continue to be strong till the time of the twelve caliphs. The people then uttered: Allah is most great, and up-roared. He then silently spoke a word which I could not understand. So I said to my father: What did he say, father? He said: All of them will belong to Quraish.