2 Samuel 20:18-22 NIV

18 She continued, "Long ago they used to say, 'Get your answer at Abel,' and that settled it.
19 We are the peaceful1 and faithful in Israel. You are trying to destroy a city that is a mother in Israel. Why do you want to swallow up the LORD's inheritance?"2

References for 2 Samuel 20:19

20 "Far be it from me!" Joab replied, "Far be it from me to swallow up or destroy!
21 That is not the case. A man named Sheba son of Bicri, from the hill country of Ephraim, has lifted up his hand against the king, against David. Hand over this one man, and I'll withdraw from the city." The woman said to Joab, "His head3 will be thrown to you from the wall."

References for 2 Samuel 20:21

22 Then the woman went to all the people with her wise advice,4 and they cut off the head of Sheba son of Bicri and threw it to Joab. So he sounded the trumpet, and his men dispersed from the city, each returning to his home. And Joab went back to the king in Jerusalem.

References for 2 Samuel 20:22