Albert Barnes Commentary Isaiah 26:11

"Jehovah, thy hand is lifted up, yet they see not: but they shall see [thy] zeal for the people, and be put to shame; yea, fire shall devour thine adversaries." — Isaiah 26:11 (ASV)

Lord, when your hand is lifted up - This is an explanation of the sentiment expressed in the former verse. The lifting up of the hand here refers, undoubtedly, to the manifestations of the majesty and goodness of the Lord.

They will not see - They are blind to all the exhibitions of power, mercy, and goodness.

But they shall see - They will yet be brought to recognize your hand. They will see your favor toward your children, and your judgment on your foes. The divine dealings will be such that they will be constrained to recognize him, and to acknowledge his existence and perfections.

And be ashamed - Be confounded because they did not sooner recognize the divine goodness.

For their envy at your people - The word ‘their’ is not in the Hebrew. The sense is that they will see the zeal of Yahweh on behalf of his people and will be ashamed that they did not sooner recognize his hand. The word rendered ‘envy’ (קנאה qin'âh may mean envy (Ecclesiastes 4:4; Ecclesiastes 9:6), but it more properly and frequently means zeal, ardor (2 Kings 10:16; Isaiah 9:6)).

Yea, the fire of your enemies shall devour them - Or rather, ‘Yea, the fire in regard to your enemies shall devour them.’ The sense is that when his people were delivered, his foes would be destroyed. His zeal for his people would also be connected with indignation against his foes. The deliverance of his people from Babylon, and the commencement of the downfall of that city, were simultaneous, and the cause was the same.