Amaziah gathers an army
Amaziah gathered an army that included mercenaries from Israel. A man of God told him to get rid of the Israelite troops, and he did.
Key passages
2 Ch 25:5–10

Then Amaziah assembled the men of Judah and set them by families under commanders of thousands and commanders of hundreds for all Judah and Benjamin. And he counted them from twenty years old and above, and found them to be three hundred thousand chosen for going out to battle, able with spear …