1 Chronicles 18:11-13

11King David also dedicated these to the Lord, along with the silver and gold that he had brought from all these nations—from Edom, from Moab, from the people of Ammon, from the Philistines, and from Amalek.

12Moreover Abishai the son of Zeruiah killed eighteen thousand Edomites in the Valley of Salt.

13He also put garrisons in Edom, and all the Edomites became David’s servants. And the Lord preserved David wherever he went.