1 Samuel 18:10

Now the Spirit of Yahweh departed from Saul, and an evil spirit from Yahweh terrorized him.

“Let our lord now speak to your servants who are before you. Let them seek a man who is a skillful musician on the harp; and it shall be that when the evil spirit from God is on you, he shall play the harp with his hand, and you will be well.”

Then Jonathan called David, and Jonathan told him all these words. And Jonathan brought David to Saul, and he was in his presence as formerly.

Now there was an evil spirit from Yahweh on Saul as he was sitting in his house with his spear in his hand, and David was playing the harp with his hand.

“And Yahweh said to him, ‘How?’ And he said, ‘I will go out and be a lying spirit in the mouth of all his prophets.’ Then He said, ‘You shall entice him and also prevail. Go out and do so.’