So David got up from the ground, bathed, put on oil, and changed his clothes. He went to the house of the Lord and worshiped. Then, when he entered his palace, he requested that food be brought to him, and he ate.
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.
So bathe yourself, rub on some perfumed oil, and get dressed up. Then go down to the threshing floor. But don’t let the man know you’re there until he finishes his meal.