2 Samuel 8:2
“And he smote Moab, and measured them with a line, casting them down to the ground; even with two lines measured he to put to death, and with one full line to keep alive. And so the Moabites became David’s servants, and brought gifts.”
And after this it came to pass, that David smote the Philistines, and subdued them: and David took Metheg–ammah out of the hand of the Philistines.
And he smote Moab, and measured them with a line, casting them down to the ground; even with two lines measured he to put to death, and with one full line to keep alive. And so the Moabites became David’s servants, and brought gifts.
David smote also Hadadezer, the son of Rehob, king of Zobah, as he went to recover his border at the river Euphrates.
And David took from him a thousand chariots, and seven hundred horsemen, and twenty thousand footmen: and David houghed all the chariot horses, but reserved of them for an hundred chariots.
Counter-Arguments
The strongest case that this verse does not belong in this theme.

Related Verses
“And he smote Moab; and the Moabites became David’s servants, and brought gifts.”
“Then Toi sent Joram his son unto king David, to salute him, and to bless him, because he had fought against Hadadezer, and smitten him: for Hadadezer had wars with Toi. And Joram brought with him vessels of silver, and vessels of gold, and vessels of brass:”
“David smote also Hadadezer, the son of Rehob, king of Zobah, as he went to recover his border at the river Euphrates.”
“And David took the shields of gold that were on the servants of Hadadezer, and brought them to Jerusalem.”
“Of Syria, and of Moab, and of the children of Ammon, and of the Philistines, and of Amalek, and of the spoil of Hadadezer, son of Rehob, king of Zobah.”