Moses
Deuteronomy 29:22ESV·traditional attribution

And the next generation, your children who rise up after you, and the foreigner who comes from a far land, will say, when they see the afflictions of that land and the sicknesses with which the LORD has made it sick—

John Calvin Reformed @genevareformer

22. So that the generation to come of your children. God enforces what we have already seen, that the punishments which He would inflict would be no ordinary ones, or such as should fall into contempt from their common use; but like portents, which should awaken astonishment among their posterity. For the question which is here put is such as refers to something extraordinary, and what is not easily comprehended.

Matthew Henry Presbyterian @wholebiblehenry

It appears by the length of the sentences here, and by the copiousness and pungency of the expressions, that Moses, now that he was drawing near to the close of his discourse, was very warm and zealous, and very desirous to impress what he said upon the minds of this unthinking people.

Commenting on Deuteronomy 29:10-29

John Gill Reformed Baptist @doctorgill

And that the whole land thereof is brimstone and salt, and burning,.... That is, is become exceeding barren, as all such land is where there are sulphureous mines, or salt pits, or burning mountains; not that this would be, or has been the case of the land of Judea in a strict literal sense; only these are expressions made use of to show the barrenness...