Mu'jam Kabir Tabarani 110 — from his father, who said: We were sitting

Abdullah bin Sa'id narrates from his father, who said: We were sitting with Sayyiduna Ali bin Abi Talib (may Allah be pleased with him), with Ammar bin Yasir on his right and Muhammad bin Abi Bakr on his left, when Ghurab bin so-and-so al-Saydani came and said: O Commander of the Believers! What do you say about Uthman? The two of them (Ammar and Muhammad) answered him before Ali could, saying: Whom are you asking about? About a man who disbelieved in Allah after his faith and became a hypocrite? The man said to the two of them: I am not asking you, nor have I come to you. Thereupon Sayyiduna Ali (may Allah be pleased with him) said to him: "I do not say what these two have said." The two of them together said to him: Then why did we kill him? He said: "He was given authority over you, and he governed badly in his last days; and you grew impatient, and you were impatient in a wicked way. By Allah! I hope that Uthman and I will be as Allah, the Mighty and Majestic, has said: 'And We will remove whatever rancour is in their breasts; (they will be) brothers, on thrones facing one another' [al-Hijr: 47]."