2 Chronicles 25:7-10

25:7 But a prophet visited him and said: “O king, the Israelite troops must not go with you, for the Lord is not with Israel or any of the Ephraimites. 25:8 Even if you go and fight bravely in battle, God will defeat you before the enemy. God is capable of helping or defeating.” 25:9 Amaziah asked the prophet: “But what should I do about the hundred talents of silver I paid the Israelite troops?” The prophet replied, “The Lord is capable of giving you more than that.” 25:10 So Amaziah dismissed the troops that had come to him from Ephraim and sent them home. They were very angry at Judah and returned home incensed.

2 Chronicles 25:13

25:13 Now the troops Amaziah had dismissed and had not allowed to fight in the battle raided the cities of Judah from Samaria to Beth Horon. They killed 3,000 people and carried off a large amount of plunder.