Merab
The elder daughter of Saul, promised to David as the reward for fighting the king's battles — an offer Saul made hoping the Philistines would kill him. David protested that he was too poor and obscure a family to be the king's son-in-law, and when the time came Merab was given to Adriel the Meholathite instead. Her five sons were among those later handed over to the Gibeonites and executed.
What we know — and how we know it
Where in scripture
1 Samuel2 SamuelNow the sons of Saul were Jonathan, Ishvi, and Malchishua; and the names of his two daughters were these: the name of the firstborn Merab, and the name of the younger Michal.
1 Samuel 14:49
Saul said to David, “Behold, my elder daughter Merab, I will give her to you as wife. Only be valiant for me, and fight Yahweh’s battles.” For Saul said, “Don’t let my hand be on him, but let the hand of the Philistines be on him.”
1 Samuel 18:17 — Promised to David
But at the time when Merab, Saul’s daughter, should have been given to David, she was given to Adriel the Meholathite as wife.
1 Samuel 18:19
But the king took the two sons of Rizpah the daughter of Aiah, whom she bore to Saul, Armoni and Mephibosheth; and the five sons of Michal the daughter of Saul, whom she bore to Adriel the son of Barzillai the Meholathite.
2 Samuel 21:8
Scripture quotations are from the World English Bible, a public-domain translation.