2SA 14:2

2 So Joab sent someone to Tekoa [town] to bring back a woman who was very clever. [When she arrived,] Joab said to her, “Pretend that you are grieving because someone has died. Put on clothes that show that you are mourning. Do not put any lotion/ointment on your body. Act as if you are a woman who has been mourning for a long time.