1 Samuel 16:21-23

Amplified Bible

²¹ Then David came to Saul and attended him. Saul loved him greatly and [later] David became his armor bearer. ²² Saul sent word to Jesse, saying, “Please let David ^[a]be my attendant, for he has found favor in my sight.” ²³ So it came about that whenever the [evil] spirit from God was on Saul, David took a harp and played it with his hand; so Saul would be refreshed and be well, and the evil spirit would leave him.