1 Samuel 16:19-23

19So Saul sent messengers to Jesse and said, “Send me your son David, who is out with the sheep.

20So Jesse took a donkey loaded with bread, a container of wine, and a young goat and sent them to Saul with his son David.

21David came to Saul and stood before him. Saul liked him a great deal, and he became his armor bearer.

22Then Saul sent word to Jesse saying, “Let David be my servant, for I really like him.”

23So whenever the spirit from God would come upon Saul, David would take his lyre and play it. This would bring relief to Saul and make him feel better. Then the evil spirit would leave him alone.