2 Chronicles 25:10-13

10So Amaziah dismissed the troops who had come to him from Ephraim and sent them home. They were furious with Judah and left for home in a great rage. 11Amaziah then marshaled his strength and led his army to the Valley of Salt, where he killed ten thousand men of Seir. 12The army of Judah also captured ten thousand men alive, took them to the top of a cliff and threw them down so that all were dashed to pieces. 13Meanwhile the troops that Amaziah had sent back and had not allowed to take part in the war raided towns belonging to Judah from Samaria to Beth Horon. They killed three thousand people and carried off great quantities of plunder.