So Asa marched out against him and lined up in battle formation in the Valley of Zephathah near Mareshah.

2 Chronicles 14:9
Then Zerah the Cushite came against them with an army of 1,000,000 men and 300 chariots, and they advanced as far as Mareshah.

2 Chronicles 14:11
Then Asa cried out to the LORD his God: "O LORD, there is no one besides You to help the powerless against the mighty. Help us, O LORD our God, for we rely on You, and in Your name we have come against this multitude. O LORD, You are our God. Do not let a mere mortal prevail against You."

Then Asa went out against him, and they set the battle in array in the valley of Zephathah at Mareshah.