Finally, Saul said to David, “Here is my oldest daughter Merab. I will give her to you as your wife if you prove yourself to be a warrior for me and fight the Lord’s battles.” (Saul thought, “I must not lay a hand on him. Let the Philistines do that.”)
Saul thought, “I’ll give her to David. She will trap him, and the Philistines will get him.” So he said to David a second time, “You will now be my son-in-law.”