Harp: David Skillful in Manipulating

Let our lord command your servants here to seek out someone who can skillfully play the harp. Whenever the spirit of distress from God is upon you, he is to play it, and you will be well.”

And whenever the spirit from God came upon Saul, David would pick up his harp and play. Then Saul would find relief and feel better, and the spirit of distress would depart from him.