What does 2 Samuel 8:2 mean?

And he smote Moab, and measured them with the line, making them to lie down on the ground; and he measured two lines to put to death, and one full line to keep alive. And the Moabites became servants to David, and brought tribute.

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 he smote Moab, and measured them with the line, making them to lie down on the ground; and he measured two lines to put to death, and one full line to keep alive. And the Moabites became servants to David, and brought tribute.

And he overcame the Moabites, and he had them measured with a line when they were stretched out on the earth; marking out two lines for death and one full line for life. So the Moabites became servants to David and gave him offerings.

And he smiteth Moab, and measureth them with a line, causing them to lie down on the earth, and he measureth two lines to put to death, and the fulness of the line to keep alive, and the Moabites are to David for servants, bearers of a present.

And he defeated Moab, and measured them with a line, casting them down to the earth: and he measured with two lines, one to put to death, and one to save alive: and Moab was made to serve David under tribute.

And he smote the Moabites, and measured them with a line, making them lie down on the ground; and he measured two lines to put to death, and one full line to keep alive. And the Moabites became David's servants, [and] brought gifts.