al-Zuhri ابن شهاب الزهري‎, محمد بن مسلم · The Book of the Merits of the Companions

I believe in it and so do Abu Bakr and Umar, but they were not at that time present there.

I shall certainly give this standard in the hand of one who loves Allah and his Messenger and Allah will grant victory at his hand. Umar b. Khattab said: Never did I cherish for leadership but on that day. I came before him with the hope that I may be called for this, but Allah's Messenger (ﷺ) called 'Ali b. Abu Talib and he conferred (this honour) upon him and said: Proceed on and do not look about until Allah…