Musannaf Ibn Abi Shaybah 40469 — Reports on Uthman (may Allah be)

The concubine of Sayyiduna Zayd bin Arqam (may Allah be pleased with him) says that Sayyiduna Ali (may Allah be pleased with him) came to visit Sayyiduna Zayd bin Arqam while he was ill, and people were sitting around him. Sayyiduna Ali said to the people: Be silent. By Allah, whatever you ask about today, I will inform you of it. Sayyiduna Zayd bin Arqam said: I adjure you by Allah! Tell me, are you the one who killed Uthman? Sayyiduna Ali lowered his gaze for a while, then said: By the One who split the seed and created the soul, I did not kill him, nor did I command it, and it did not grieve me.