Sayyiduna Ubayy bin Ka'b (may Allah be pleased with him) narrates that the Messenger of Allah (peace and blessings be upon him) led the prayer and (during the recitation) left out a verse, and among the people was Sayyiduna Ubayy bin Ka'b (may Allah be pleased with him) as well. (After the prayer) he said, "O Messenger of Allah (peace and blessings be upon him), did you forget such-and-such verse or has it been abrogated?" The Prophet (peace and blessings be upon him) said: "I forgot it." This is the narration of Bundar, and in the narration of Abu Musa it is mentioned that the Noble Prophet (peace and blessings be upon him), while reciting during the prayer, forgot a verse of the Qur'an, and among the worshippers was Sayyiduna Ubayy (may Allah be pleased with him) as well. He said, "O Messenger of Allah, you forgot such-and-such verse or has it been made to be forgotten (abrogated)?" The Prophet (peace and blessings be upon him) said: "No (it has not been abrogated), rather I forgot it."