Thematic Bible: Betrothed to david by saul

Saul said to David, My elder daughter Merab I will give you as wife; only serve me courageously and fight the Lord's battles. For Saul thought, Let not my hand, but the Philistines' hand, be upon him. David said to Saul, Who am I, and what is my life or my father's family in Israel, that I should be the king's son-in-law?