2 Chronicles 25:6-8

Living Bible

^5-6 Another thing Amaziah did was to organize the army, assigning leaders to each clan from Judah and Benjamin. Then he took a census and found that he had an army of 300,000 men twenty years old and older, all trained and highly skilled in the use of spear and sword. He also paid $200,000 to hire 100,000 experienced mercenaries from Israel.

⁷ But a prophet arrived with this message from the Lord: “Sir, do not hire troops from Israel, for the Lord is not with them. ⁸ If you let them go with your troops to battle, you will be defeated no matter how well you fight; for God has power to help or to frustrate.”