Methinks I would read these verses with a twofold aspect. God had said by the prophet, in a preceding chapter; Say ye to the righteous, that it shall be well with him; while to the wicked, it shall be ill with him, Isaiah 3:10-11. And may we not make application of what is here said, in both senses? The Lord will lift up an ensign for his people, in the same moment that he will lift up an ensign for destruction to his enemies. And when Jesus, the glorious ensign of his people's redemption comes, it is both for vengeance and for salvation. See Isaiah 11:10 and Isaiah 63:4.
Related Commentaries of Isaiah 5:26
Isaiah 5:26-30
26 And he will lift up an ensign to the nations from far, and will hiss unto them from the end of the earth: and, behold, they shall come with speed swiftly:
27 None shall be weary nor stumble among them; none shall slumber nor sleep; neither shall the girdle of their loins be loosed, nor the latchet of their shoes be broken:
28 Whose arrows are sharp, and all their bows bent, their horses' hoofs shall be counted like flint, and their wheels like a whirlwind:
29 Their roaring shall be like a lion, they shall roar like young lions: yea, they shall roar, and lay hold of the prey, and shall carry it away safe, and none shall deliver it.
30 And in that day they shall roar against them like the roaring of the sea: and if one look unto the land, behold darkness and sorrow,h and the light is darkened in the heavens thereof.