Hazrat Umar narrates that the Noble Prophet (peace and blessings be upon him) said: Soon a person will come to you whose name will be Uwais. There will be a white mark on his face. When he prays to Allah, Allah will remove it. Whoever among you meets him should ask him to seek forgiveness for him. The narrator says: Hazrat Umar (may Allah be pleased with him) met him and said: Pray for forgiveness for me. So he (may Allah be pleased with him) prayed for his forgiveness.