1 Samuel 18:17; 1 Samuel 18:19

17 Then Saul said to David, "Here is my elder daughter Merab. I will give her to you for a wife. Only be valiant for me and fight the LORD's battles." For Saul thought, "Let not my hand be against him, but let the hand of the Philistines be against him."

19 But at the time when Merab, Saul's daughter, should have been given to David, she was given to Adriel the Meholathite for a wife.