What did the Prophet Muhammad (saw) say when he was told that Abu 'Amir was hit with an arrow in his knee?
 Narrated Abu Musa:                     Abu 'Amir was hit with an arrow in his knee, so I went to him and he asked me to remove the arrow. When I removed it, the water started dribbling from it. Then I went to the Prophet and told him about it. He said, "O Allah! Forgive `Ubaid Abu 'Amir."