Isaiah 8:9

Associate yourselves, O ye people
Both of Syria and Israel, whose two kings were confederate against Judah: and ye shall be broken in pieces;
as the kingdom of Syria was by Tilgathpilneser quickly after this, ( 2 Kings 16:9 ) and the kingdom of Ephraim or Israel by Shalmaneser, ( 2 Kings 17:6 ) ( Isaiah 8:8 ) : and give ear, all ye of far countries;
the Assyrians, and the nations that belonged to them, who were more remote from Judea: gird yourselves;
for a long and tedious march, and for war; it may signify the putting on of their whole armour; for, as Pausanius ^F19 says, the ancients used to call putting on of armour, girding: and ye shall be broken in pieces:
as the Assyrian army was, which came up against Jerusalem in Hezekiah's time, ( 2 Kings 19:35 ) : gird yourselves, and ye shall be broken in pieces;
this is repeated for confirmation sake, to denote the certainty of it.