1 Samuel 18:12-17

12And Saul was afraid of David, because Jehovah was with him, and was departed from Saul. 13Therefore Saul removed him from him, and made him his captain over a thousand; and he went out and came in before the people. 14And David behaved himself wisely in all his ways; and Jehovah was with him. 15And when Saul saw that he behaved himself very wisely, he stood in awe of him. 16But all Israel and Judah loved David; for he went out and came in before them.

17And Saul said to David, Behold, my elder daughter Merab, her will I give thee to wife: only be thou valiant for me, and fight Jehovah’s battles. For Saul said, Let not my hand be upon him, but let the hand of the Philistines be upon him.