1 Samuel 18:17; 1 Samuel 18:19

17 Saul said to David, “Here is my older daughter Merab. I will give her to you in marriage; only serve me bravely and fight the battles of the LORD.” For Saul said to himself, “I will not raise a hand against him. Let the Philistines do that!”

19 So when the time came for Merab, Saul’s daughter, to be given to David, she was given in marriage to Adriel of Meholah.