Saul said to David, Behold, my elder daughter Merab, her will I give you as wife: only be valiant for me, and fight Yahweh's battles. For Saul said, Don't let my hand be on him, but let the hand of the Philistines be on him.
Of course, he was not aware of the fact that God had chosen David to be the king, and that God had anointed David to be king over Israel. So it is interesting that immediately he began to suspicion the fact that the kingdom was in jeopardy. "What does he want more than this, the kingdom?"