1 Samuel 16:19-23

19Wherefore Saul sent messengers unto Jesse, and said, Send me David thy son, who is with the sheep. 20And Jesse took an ass laden with bread, and a bottle of wine, and a kid, and sent them by David his son unto Saul. 21And David came to Saul, and stood before him: and he loved him greatly; and he became his armorbearer. 22And Saul sent to Jesse, saying, Let David, I pray thee, stand before me; for he hath found favor in my sight. 23And it came to pass, when the evil spirit from God was upon Saul, that David took the harp, and played with his hand: so Saul was refreshed, and was well, and the evil spirit departed from him.