If he, i.e. the wicked man last mentioned, either Cush or Saul, turn not from this wicked course of calumnating or persecuting me, he, i.e. God, who is often designed by this pronoun, being easily to be understood from the nature of the thing, will whet his sword, i.e. will prepare, and hasten, and speedily execute his judgments upon him. Did I say, he will do it ? nay, he hath already done it; his sword is drawn, his bow is bent, and the arrows are prepared and ready to be shot.
Related Commentaries of Psalms 7:12
Psalms 7:12
12 If he turn not, he will whet his sword; he hath bent his bow, and made it ready.