Banu Kalb
Usama next marched to Mu'tah, attacked the Christian Arabs of the tribes of Banu Kalb and the Ghassanids in a small battle. Then he returned to Medina, bringing with him a large number of captives and a considerable amount of wealth, part of which comprised the spoils of war and part taxation of the re-conquered tribes. The Islamic army remained out of Medina for 40 days.