Cross reference
1 Samuel 19:9
9 And an evil spirit from the Lord came on Saul, when he was seated in his house with his spear in his hand; and David made music for him.
1 Samuel 16:14
14 Now the spirit of the Lord had gone from Saul, and an evil spirit from the Lord was troubling him.
1 Samuel 18:10-11
10 Now on the day after, an evil spirit from God came on Saul with great force and he was acting like a prophet among the men of his house, while David was making music for him, as he did day by day: and Saul had his spear in his hand.
11 And Saul, balancing the spear in his hand, said, I will give David a blow, pinning him to the wall. And David got away from him twice.
1 Samuel 16:16
16 Now give orders to your servants who are here before you to go in search of a man who is an expert player on a corded instrument: and it will be that when the evil spirit from God is on you, he will make music for you on his instrument, and you will get well.