He also put garrisons in Edom, and all the Edomites became David's servants. And the LORD preserved David wherever he went.
1 Chronicles 18:13
Surrounding context
18:12 Moreover Abishai the son of Zeruiah killed eighteen thousand Edomites in the Valley of Salt.
18:13 He also put garrisons in Edom, and all the Edomites became David's servants. And the LORD preserved David wherever he went.
18:14 So David reigned over all Israel, and administered judgment and justice to all his people.