2 Samuel 14:1

14:1 So Joab the son of Zeruiah perceived that the king's heart was concerned about Absalom.

14:2 And Joab sent to Tekoa and brought from there a wise woman, and said to her, "Please pretend to be a mourner, and put on mourning apparel; do not anoint yourself with oil, but act like a woman who has been mourning a long time for the dead.