David: This measure of David's, in uniting himself to the enemies of his God and people, was highly blameable; was calculated to alienate the affections of the Israelites; and led to equivocation, if not downright falsehood.
the six: 1 Samuel 25:13, 1 Samuel 30:8
Achish: 1 Samuel 21:10; 1 Kings 2:40