2 Samuel 20:22

Then the woman went unto all the people, the citizens of Abel, in her wisdom, laying the proposition of Joab before them, which she persuaded them to accept. And they cut off the head of Sheba, the son of Bichri, and cast it out to Joab. And he, his purpose having been attained, blew a trumpet, and they retired from the city, every man to his tent. The return march was begun at once. And Joab returned to Jerusalem unto the king.