John Calvin Commentary Isaiah 34:10

"It shall not be quenched night nor day; the smoke thereof shall go up for ever; from generation to generation it shall lie waste; none shall pass through it for ever and ever." — Isaiah 34:10 (ASV)

By night and by day it shall not be quenched. The Prophet’s language is undoubtedly hyperbolical; but the Lord is compelled to act towards us in this manner, for otherwise plain words would produce no impression on us.

When he declares that the wrath of God against the Edomites will resemble a fire that burns continually, he cuts off from them all hope of pardon, because, having never ceased to provoke God, they find that he is implacable. Malachi also pronounces this expression of reprobation: that the curse of God will forever rest on that nation (Malachi 1:4).

The contrast must be supplied, because some mitigation is always held out to the people of God for their comfort. But this does not need a lengthened interpretation. It is enough that we understand the meaning and design of the Prophet.