When David was in Edom, to wit, by his army, to war against it. See 1 Chronicles 18:12,13. To bury the slain, to wit, the Israelites which were slain in the battle, 2 Samuel 8:13,14, whom he honourably inferred in some certain place, to which he is said to go up for that end. And this may be mentioned as that which gave Hadad the opportunity of making his escape, whilst Joab and his men were employed in that solemnity. After he had smitten every male in Edom; or, and he smote, &c., as it is in the Hebrew; which is here noted as the cause of Hadad's flight, he smote, &c. He understood what Joab had done in part, and intended further to do, even to kill all the males, and therefore fled for his life.
Related Commentaries of 1 Kings 11:15
1 Kings 11:15
15 For it came to pass, when David was in Edom, and Joab the captain of the host was gone up to bury the slain, after he had smitten every male in Edom;