1 Samuel 18:17-18

Saul said to David, “Here is my older daughter Merab. I will let you marry her. All I ask is that you remain brave and fight the LORD’s battles.” Saul thought, “I won’t have to kill David. The Philistines will do that.” But David answered Saul, saying, “Who am I? My family is not important enough for me to become the king’s son-in-law.”