When Merab should have been given to David; when the marriage was even ready to be solemnized. Adriel the Meholathite, the son of Barzillei, as he is called, 2 Samuel 21:8. This was an act of great injustice and perfidiousness; and accordingly this marriage was accursed by God, and the children begotten in it were by God's appointment cut off, 2Sa 21 $.
Related Commentaries of 1 Samuel 18:19
1 Samuel 18:19
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.