2 Samuel 24:3

Joab said unto the king— It is evident, that this action of David was thought a very wrong step, even by Joab himself, who remonstrated against it, as apprehensive of the bad consequences which might attend it: and therefore Joab counted not Levi and Benjamin, 1 Chronicles 21:6 because the king's word was abominable to him. Probably, we do not understand all the circumstances of this affair; but Joab's sense of it, who was no scrupulous man, shews that David's conduct in it was extremely imprudent, and might subject his people to very bad consequences.