'Rear guard' in the Bible

And the armed men went before the priests that blew with the trumpets, and the rear-guard came after the ark, the priests going on, and blowing with the trumpets.

And seven priests bearing seven trumpets of rams' horns before the ark of the LORD went on continually, and blew with the trumpets: and the armed men went before them; but the rear-guard came after the ark of the LORD, the priests going on, and blowing with the trumpets.