So the woman replied, "Watch this! His head will be thrown to you over the city wall." Then the woman wisely went back to her people. They cut off the head of Bichri's son Sheba and threw it out to Joab, so Joab sounded his battle trumpet and they withdrew from the city. Everybody went back home and Joab returned to the king at Jerusalem.

Joab’s troops came and besieged Sheba in Abel of Beth-maacah. They built an assault ramp against the outer wall of the city. While all the troops with Joab were battering the wall to make it collapse,

And if so be that the king's wrath arise, and he say unto thee, Wherefore approached ye so nigh unto the city when ye did fight? knew ye not that they would shoot from the wall?

The matter is not so: but a man of mount 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.