'Harp' in the Bible
Afterward you will come to the hill of God where the Philistine garrison is; and it shall be as soon as you have come there to the city, that you will meet a group of prophets coming down from the high place with harp, tambourine, flute, and a lyre before them, and they will be prophesying.
Let our lord now command your servants who are before you. Let them seek a man who is a skillful player on the harp; and it shall come about when the evil spirit from God is on you, that he shall play the harp with his hand, and you will be well.”
So it came about whenever the evil spirit from God came to Saul, David would take the harp and play it with his hand; and Saul would be refreshed and be well, and the evil spirit would depart from him.
Now it came about on the next day that an evil spirit from God came mightily upon Saul, and he raved in the midst of the house, while David was playing the harp with his hand, as usual; and a spear was in Saul’s hand.
Now there was an evil spirit from the Lord on Saul as he was sitting in his house with his spear in his hand, and David was playing the harp with his hand.