2 Chronicles 25:11 in the King James Version
And Amaziah strengthened himself, and led forth his people, and went to the valley of salt, and smote of the children of Seir ten thousand.
Context
10 Then Amaziah separated them, the army that had come to him out of Ephraim, to go home again. Therefore their anger was greatly kindled against Judah, and they returned home in fierce anger.
11 Amaziah took courage, and led his people out and went to the Valley of Salt, and struck ten thousand of the children of Seir.
12 The children of Judah carried away ten thousand alive, and brought them to the top of the rock, and threw them down from the top of the rock, so that they all were broken in pieces.