Sahih Muslim Book 41, Hadith Number 7035.
Chapter : The Remaining Ahadith Pertaining to the Dajjal.
Umm Sharik reported: I heard Allah’s Messenger (may peace be upon him) as saying: The people would run away from the Dajjal seeking shelter in the mountains. She said: Where would be the Arabs then in that day? He said: They would be small in number.