And there came out against them Zerah the Ethiopian with an host of a thousand thousand, and three hundred chariots; and came unto Mareshah. Zerah the Ethiopian - Probably of that Ethiopia which lay on the south of Egypt, near to Libya, and therefore the Libyans are joined with them, 2 Chronicles 16:8.
A thousand thousand - If this people had come from any great distance, they could not have had forage for such an immense army.