2 Samuel 8:13-14

13And David became famous after he returned from striking down eighteen thousand Edomites A few Hebrew manuscripts, Septuagint and Syriac (see also 1 Chron. 18:12); most Hebrew manuscripts Aram (that is, Arameans) in the Valley of Salt.

14He put garrisons throughout Edom, and all the Edomites became subject to David. The LORD gave David victory wherever he went.