1 Chronicles 19:8-10

New Catholic Bible

⁸ David heard about this, so he sent Joab and his army of brave warriors out. ⁹ The Ammonites came and arranged themselves in battle line at the gate to the city while the kings who had come with them stood in the fields by themselves.

¹⁰ Joab saw that they were arranged in battle line both in front of him and behind him, so he chose some of the best men in Israel and placed them up against the Arameans.