1 Samuel 18:12-15

18:12 So Saul feared David, because the Lord was with him but had departed from Saul. 18:13 Saul removed David from his presence and made him a commanding officer. David led the army out to battle and back. 18:14 Now David achieved success in all he did, for the Lord was with him. 18:15 When Saul saw how very successful he was, he was afraid of him.

1 Samuel 18:28-29

18:28 When Saul realized that the Lord was with David and that his daughter Michal loved David, 18:29 Saul became even more afraid of him. Saul continued to be at odds with David from then on.