1 Samuel 16:21-23

New Catholic Bible

²¹ David came to Saul and entered into his service. He loved him very much, and he became his armor-bearer.

²² Saul sent to Jesse saying, “Please let David be in my service, for he has found favor in my sight.” ²³ Whenever an evil spirit came upon Saul, David took a harp and played it. Saul revived and he felt better, and the evil spirit would depart from him.