It is narrated from Hazrat Anas (may Allah be pleased with him) that when the Prophet (peace and blessings be upon him) would come to the mosque, all the Ansar and Muhajirin would be present there, but except for Hazrat Abu Bakr and Umar (may Allah be pleased with them), no one would raise his head. The Prophet (peace and blessings be upon him) would look at them and smile, and they both would look at the Prophet (peace and blessings be upon him) and smile.