1 Samuel 16:16-23

16Let our lord now command thy servants, which are before thee, to seek out a man who is a cunning player on the harp: and it shall come to pass, when the evil spirit from God is upon thee, that he shall play with his hand, and thou shalt be well. 17And Saul said unto his servants, Provide me now a man that can play well, and bring him to me. 18Then answered one of the young men, and said, Behold, I have seen a son of Jesse the Beth-lehemite, that is cunning in playing, and a mighty man of valour, and a man of war, and prudent in speech, and a comely person, and the LORD is with him. 19Wherefore Saul sent messengers unto Jesse, and said, Send me David thy son, which 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 armourbearer. 22And Saul sent to Jesse, saying, Let David, I pray thee, stand before me; for he hath found favour 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.