1 Samuel 18:12-17

12So Saul was afraid of David, because the LORD was with David but had departed from Saul. 13Therefore Saul sent David away and gave him command of a thousand men. David led the troops out to battle and back, 14and he continued to prosper in all his ways, because the LORD was with him.

15When Saul saw that David was very successful, he was afraid of him. 16But all Israel and Judah loved David, because he was leading them out to battle and back.

17Then Saul said to David, “Here is my older daughter Merab. I will give her to you in marriage. Only be valiant for me and fight the LORD’s battles.” But Saul was thinking, “I need not raise my hand against him; let the hand of the Philistines be against him.”