Musannaf Ibn Abi Shaybah

Hazrat Mirrah al-Bahzi (may Allah be pleased with him) narrates that while we were one day with the Noble Prophet (peace and blessings be upon him) in one of the streets of Madinah, the Prophet (peace be upon him) said: "What will be your condition during that tribulation which will break out in the corners of the earth, as if it were like the two horns of a cow?" The Companions (may Allah be pleased with them) asked: "O Messenger of Allah (peace be upon him)! What should we do in that situation?" The Prophet (peace be upon him) said: "It is obligatory upon you to follow that person and his group." The narrator says: So I hurried until I reached that man, then I asked: "O Prophet of Allah (peace be upon him)! This man?" The Prophet (peace be upon him) said: "This very man." And that was Hazrat Uthman (may Allah be pleased with him).