Amaziah then marshaled his strength and led his army to the Valley of Salt, where he killed ten thousand men of Seir. (NIV)
And Amaziah took courage and led forth his people to the Valley of Salt and smote 10,000 of the men of Seir [Edom]. (AMP)
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. (KJV)