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!

21That is not so. But a man from the mountains of Ephraim, Sheba the son of Bichri by name, has raised his hand against the king, against David. Deliver him only, and I will depart from the city.” So the woman said to Joab, “Watch, his head will be thrown to you over the wall.”

22Then the woman in her wisdom went to all the people. And they cut off the head of Sheba the son of Bichri, and threw it out to Joab. Then he blew a trumpet, and they withdrew from the city, every man to his tent. So Joab returned to the king at Jerusalem.