and promptly repaying those who hate him, so as to utterly ruin them, without further delay, quickly rendering to them what they deserve
Other versions
King James Version
And repayeth them that hate him to their face, to destroy them: he will not be slack to him that hateth him, he will repay him to his face.English Standard Version
and repays to their face those who hate him, by destroying them. He will not be slack with one who hates him. He will repay him to his face.New International Version
But those who hate him he will repay to their face by destruction; he will not be slow to repay to their face those who hate him.