2 Chronicles 25:11-12
11-12But 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.
13But the troops Amaziah had dismissed from his army, angry over their lost opportunity for plunder, rampaged through the towns of Judah all the way from Samaria to Beth Horon, killing three thousand people and taking much plunder.