2 Chronicles 25:7-12

A holy man showed up and said, “No, O King—don’t let those northern Israelite soldiers into your army; GOD is not on their side, nor with any of the Ephraimites. Instead, you go by yourself and be strong. God and God only has the power to help or hurt your cause.” But Amaziah said to the holy man, “But what about all this money—these tons of silver I have already paid out to hire these men?” “GOD’s help is worth far more to you than that,” said the holy man. So Amaziah fired the soldiers he had hired from the north and sent them home. They were very angry at losing their jobs and went home seething. But Amaziah was optimistic. He led his troops into the Valley of Salt and killed ten thousand men of Seir. They took another ten thousand as prisoners, led them to the top of the Rock, and pushed them off a cliff. They all died in the fall, smashed on the rocks.