1 Samuel 16:15-16 KJV
And Saul's servants said unto him, Behold now, an evil spirit from God troubleth thee. [16] 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.
1 Samuel 16:23 KJV
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.