The reduction of Edom. The paragraph mark should be at 1 Chronicles 18:12, not 1 Chronicles 18:13.
Related Commentaries of 1 Chronicles 18:12
1 Chronicles 18:12-13
12 Moreover Abishaig the son of Zeruiah slew of the Edomites in the valley of salt eighteen thousand.
13 And he put garrisons in Edom; and all the Edomites became David's servants. Thus the LORD preserved David whithersoever he went.