So Joab sent to Tekoa and brought from there a wise woman. He told her, “Pretend to be in mourning and put on garments for mourning. Don’t anoint yourself with oil. Instead, act like a woman who has been mourning for the dead for some time.
(19:1) The king then became very upset. He went up to the upper room over the gate and wept. As he went he said, “My son, Absalom! My son, my son, Absalom! If only I could have died in your place! Absalom, my son, my son!”
So the victory of that day was turned to mourning as far as all the people were concerned. For the people heard on that day, “The king is grieved over his son.”