Musannaf Ibn Abi Shayba 23:174

Qabisah ibn Uqbah narrated to us, from Hammad ibn Salamah, from Ali ibn Zayd, from Abd al-Rahman ibn Abi Bakrah, from his father, who said: We arrived with Ziyad to Mu'awiyah, and he was not amazed by any delegation as he was amazed by us. He said, "O Abu Bakrah, narrate to me something you heard from the Messenger of Allah (peace and blessings of Allah be upon him)." He said: I heard the Messenger of Allah (peace and blessings of Allah be upon him) say—and he used to be pleased by a good dream and would ask about it—he said: "I saw a scale descend from the sky. I was weighed in it against Abu Bakr, and I outweighed Abu Bakr. Then Abu Bakr and Umar were weighed, and Abu Bakr outweighed Umar. Then Umar and Uthman were weighed, and Umar outweighed Uthman. Then the scale was raised to the sky." The Messenger of Allah (peace and blessings of Allah be upon him) then said: "A Caliphate of Prophethood, then Allah gives the kingdom to whom He wills." He said: Then he went out into our courtyards, and we went out.