1 Chronicles 12:18 CEV

[18] Amasai, who later became the leader of the Thirty Warriors, was one of these men who went to David. God's Spirit took control of him, and he said, "We will join you, David son of Jesse! You and your followers will always be successful, because God fights on your side." So David agreed to let them stay, and he even put them in charge of his soldiers who raided enemy villages.