2 Samuel 10:8-9, 11-12

The Ammonite troops came out and drew up their battle lines at the entrance of the city gate, while the Arameans from Zobah and Rehob and the men from Tob and Maacah positioned themselves to fight in the open fields. When Joab saw that he would have to fight on both the front and the rear, he chose some of Israel’s elite troops and placed them under his personal command to fight the Arameans in the fields.

“If the Arameans are too strong for me, then come over and help me,” Joab told his brother. “And if the Ammonites are too strong for you, I will come and help you. Be courageous! Let us fight bravely for our people and the cities of our God. May the LORD’s will be done.”