1 Samuel 20:16

This verse also is very difficult, hut it is probably to be taken as an insertion of the narrator: "So Jonathan made a covenant with the house of David"—that is, so as to bind his descendants—"saying, Let Jehovah require it at the hand of David's enemies." These last words probably are a euphemism, and mean David himself. So Rashi explains the words. The courtesy of an Oriental forbade his saying, May Jehovah punish David for it, but he prays that God would requite it on some one. But if the Divine anger visits even David's enemies for it, how much more the guilty perjurer himself.