Musannaf Ibn Abi Shayba 37:216

Yahya ibn Adam narrated to us, from Fitr, who said: Mundhir al-Thawri narrated to us, from Muhammad ibn Ali ibn al-Hanafiyyah, who said: "Beware of these tribulations, for no one exposes himself to them except that they consume him. Know that these people have an appointed time and a duration; if all those on earth were to gather to remove their dominion, they would not be able to do so until Allah is the One who permits it. Are you able to remove these mountains?"