1 Samuel 18:12-16, 28-30

Saul was afraid of David because the LORD was with him but had departed from Saul. So Saul removed him from his presence and made him a commander of a thousand. And he went out and came in before the people. And David had success in all his undertakings, for the LORD was with him. And when Saul saw that he had great success, he stood in fearful awe of him. But all Israel and Judah loved David, for he went out and came in before them.

But when Saul saw and knew that the LORD was with David, and that Michal, Saul’s daughter, loved him, Saul was even more afraid of David. So Saul was David’s enemy continually. Then the commanders of the Philistines came out to battle, and as often as they came out David had more success than all the servants of Saul, so that his name was highly esteemed.