2 Chronicles 25:11 in the World English Bible
Amaziah took courage, and led his people out and went to the Valley of Salt, and struck ten thousand of the children of Seir.
Context
10 Then Amaziah separated them, to wit, the army that was come to him out of Ephraim, to go home again: wherefore their anger was greatly kindled against Judah, and they returned home in great anger.
11 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.
12 And other ten thousand left alive did the children of Judah carry away captive, and brought them unto the top of the rock, and cast them down from the top of the rock, that they all were broken in pieces.