Cross reference
1 Samuel 18:2
2 Saul took him that day, and would let him go no more home to his father's house.
1 Samuel 17:15
15 Now David went back and forth from Saul to feed his father's sheep at Bethlehem.
1 Samuel 16:21-23
21 David came to Saul, and stood before him: and he loved him greatly; and he became his armor bearer.
22 Saul sent to Jesse, saying, Please let David stand before me; for he has found favor in my sight.
23 It happened, when the [evil] spirit from God was on Saul, that David took the harp, and played with his hand: so Saul was refreshed, and was well, and the evil spirit departed from him.