King James Dictionary

Muster To number; inspect; to assemble troops. The noise of a multitude in the mountains, like as of a great people; a tumultuous noise of the kingdoms of nations gathered together: the LORD of hosts MUSTERETH the host of the battle. They come from a far country, from the end of heaven, even the LORD, and the weapons of his indignation, to destroy the whole land. (Isa 13,5)