When the Ammonites saw that the Arameans had run away, they also ran away from Abishai, and retreated into the town. So Joab went back to Jerusalem after fighting the Ammonites.
In the spring, at the time of year when kings go out to war, David sent out Joab and his officers and the whole Israelite army on an attack. They massacred the Ammonites and besieged Rabbah. However, David remained behind in Jerusalem.
David then spoke to Abishai, saying, “Now Sheba the son of Bichri is going to cause us more trouble than Absalom did. Take the king's men and chase him down, or he will take over fortified towns and get away from us.”