Musannaf Ibn Abi Shaybah 34281 — The virtues of Ali bin Abi Talib

Abd al-Malik bin Abi Sulayman (may Allah have mercy on him) said: I asked Ata (may Allah have mercy on him): "Was there anyone among the Companions (may Allah be pleased with them) of the Messenger of Allah (peace and blessings be upon him) who had more knowledge than Sayyiduna Ali (may Allah be pleased with him)?" He said: "No, by Allah! I do not know of anyone."