Muhammad bin Abdullah bin Numayr narrates that Sayyiduna Ubayy bin Ka'b (may Allah be pleased with him) died during the caliphate of Sayyiduna Umar bin al-Khattab (may Allah be pleased with him) in the year 22 AH.

Muhammad bin Umar also mentioned a similar lineage and added that he was among the seventy Ansar who attended the Pledge of Aqabah, and that he used to write down the revelation for the Messenger of Allah (peace and blessings be upon him). There is disagreement about the time of his death: one view is that he died during the caliphate of Sayyiduna Umar in the year 22 AH, while according to another view he died during the caliphate of Sayyiduna Uthman (may Allah be pleased with him) in the year 30 AH, and this is the more reliable view, because Sayyiduna Uthman (may Allah be pleased with him) had ordered him to compile the Qur'an.

Utayy al-Sa'di narrates: I saw Sayyiduna Ubayy bin Ka'b (may Allah be pleased with him); the hair of his head and beard was completely white, and he did not apply dye (khidab).