It is narrated from Hazrat Abu Saeed Khudri (may Allah be pleased with him) that in the year of Hudaybiyyah, the Prophet (peace and blessings of Allah be upon him) and all his companions (may Allah be pleased with them) entered into Ihram, "except Hazrat Uthman (may Allah be pleased with him) and Abu Qatadah (may Allah be pleased with him)." The Prophet (peace and blessings of Allah be upon him) prayed for forgiveness three times for those who shaved their heads and once for those who trimmed their hair.