Musannaf Ibn Abi Shaybah 40503 — Reports on Uthman (may Allah be)

Abu Wa'il said: When Sayyiduna Uthman (may Allah be pleased with him) was martyred, Sayyiduna Abu Musa (may Allah be pleased with him) said: "Indeed, this trial is one that rips open the belly, like a disease of the stomach; we do not know from where it has come. It has come to you from your place of safety. It will make the forbearing person like a child of yesterday. You will sever your ties of kinship; so take the heads off your spears."