This is added to aggravate his crime, that he was a degenerate branch of that noble stock of Caleb, and consequently of the tribe of Judah, as David was.
Related Commentaries of 1 Samuel 25:3
1 Samuel 25:3
3 Now the name of the man was Nabal; and the name of his wife Abigail: and she was a woman of good understanding, and of a beautiful countenance: but the man was churlish and evil in his doings; and he was of the house of Caleb.