مسند أحمد

It was narrated from 'Amr bin Huraith that Abu Bakr as-Siddeeq recovered from a sickness and went out to the people. He apologised for something and said: We did not intend anything but good. Then he said: The Messenger of Allah (ﷺ) told us: `The Dajjal will emerge from a land in the East called Khurasan and he will be followed by people with faces like hammered shields.”