1 Samuel 18:19
But it came to pass at the time when Merab Saul’s daughter should have been given to David, that she was given unto Adriel the Meholathite to wife.
Cross-references
Judges 14:20
Parallel
Judges 14:20 also tells of a promised bride being given to another — Samson's wife to his companion, just as Merab is given to Adriel instead of David.
2 Samuel 21:8
Historical context
2 Samuel 21:8 reveals the sons of Merab and Adriel, showing the tragic outcome of Merab's marriage to Adriel instead of David.