1 Samuel 25:14-17

But one of the young men told Abigail, &c. One of those belonging to Nabal. Who can help admiring the wisdom and fidelity of this shepherd, who admonished his mistress of the danger her family was in; as he rationally concluded from the rude abuse that had been put upon David, whose merits he honestly set forth before her. They were a wall unto us This servant says more than David's men had said of themselves; that they not only did them no harm, but were a guard to them against robbers and against wild beasts. A man cannot speak to him But he flies into a passion. Nabal must have been a most brutish, churlish man, to extort such a character of himself from his own servants.