1 Samuel 16:20-24

And Jesse took an ass laden with bread, and a bottle of wine, and a kid, and sent them by David his son unto Saul.

And David came to Saul, and stood before him: and he loved him greatly; and he became his armourbearer.

And Saul sent to Jesse, saying, Let David, I pray thee, stand before me; for he hath found favour in my sight.

And it came to pass, when the evil spirit from God was upon Saul, that David took an harp, and played with his hand: so Saul was refreshed, and was well, and the evil spirit departed from him.