2 Samuel 20:20-22

20And Joab answered and said, Far be it, far be it from me, that I should swallow up or destroy. 21The matter is not so: but a man of the hill-country of Ephraim, Sheba the son of Bichri by name, hath lifted up his hand against the king, even against David; deliver him only, and I will depart from the city. And the woman said unto Joab, Behold, his head shall be thrown to thee over the wall. 22Then the woman went unto all the people in her wisdom. And they cut off the head of Sheba the son of Bichri, and threw it out to Joab. And he blew the trumpet, and they were dispersed from the city, every man to his tent. And Joab returned to Jerusalem unto the king.