While the horns continued to sound, the armed troops marched ahead of the priests who blew the horns, and the rear guard followed the ark.
KJV
And the armed men went before the priests that blew with the trumpets, and the rereward came after the ark, [the priests] going on, and blowing with the trumpets.
ASV
And the armed men went before the priests that blew the trumpets, and the rearward went after the ark, the priests blowing the trumpets as they went.