1 Samuel 16:14-18

But the Spirit of the LORD departed from Saul, and an evil spirit from the LORD troubled him.

And Saul’s servants said unto him, Behold now, an evil spirit from God troubleth thee.

Let our lord now command thy servants, which are before thee, to seek out a man, who is a cunning player on an 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.

And Saul said unto his servants, Provide me now a man that can play well, and bring him to me.

Then answered one of the servants, and said, Behold, I have seen a son of Jesse the Beth-lehemite, that is cunning in playing, and a mighty valiant man, and a man of war, and prudent in matters, and a comely person, and the LORD is with him.