C. F. Keil and Franz Delitzsch on 2 Samuel 19:6

2Sa 19:6 לאהבה, “to love” (i.e., in that thou lovest) “those who hate thee, and hatest those who love thee; for thou hast given to know to-day (through thy conduct) that chiefs and servants (commanders and soldiers) are nothing (are worth nothing); for I have perceived to-day (or I perceive to-day) that if (לא for לוּ) Absalom were alive, and we had all perished, that it would be right in thine eyes.”