Abdullah bin Abd al-Rahman bin Abza narrates from his father: When people became embroiled in the affair (turmoil) of Sayyiduna Uthman (may Allah be pleased with him), I said to Sayyiduna Ubayy bin Ka'b (may Allah be pleased with him): O Abu al-Mundhir, what is the way out of this turmoil? He said: "The Book of Allah and the Sunnah of His Prophet. Whatever becomes clear to you, act upon it, and whatever is doubtful to you, entrust it to the one who knows it (Allah)."

It is narrated from Muhammad bin Ishaq that the Messenger of Allah (peace and blessings be upon him) established brotherhood among his Companions, and he (peace and blessings be upon him) established brotherhood (mu'akhah) between Sayyiduna Ubayy bin Ka'b and Sayyiduna Sa'id bin Zayd bin Amr bin Nufayl (may Allah be pleased with them both).