16:21. And David came to Saul, and stood before him: and he loved him exceedingly, and made him his armourbearer.
16:22. And Saul sent to Isai, saying: Let David stand before me: for he hath found favour in my sight.
16:23. So whensoever the evil spirit from the Lord was upon Saul, David took his harp, and played with his hand, and Saul was refreshed, and was better, for the evil spirit departed from him.
Departed from him... Chased away by David's devotion.
1 Kings Chapter 17
War with the Philistines. Goliath challengeth Israel. He is slain by David.
17:1. Now the Philistines gathering together their troops to battle, assembled at Socho of Juda: and camped between Socho and Azeca, in the borders of Dommim.
17:2. And Saul and the children of Israel being gathered together, came to the valley of Terebinth, and they set the army in array to fight against the Philistines.
17:3. And the Philistines stood on a mountain on the one side, and Israel stood on a mountain on the other side: and there was a valley between them.
17:4. And there went out a man baseborn from the camp of the Philistines, named Goliath, of Geth, whose height was six cubits and a span: