Moses
Deuteronomy 29:15ESV·traditional attribution

but with whoever is standing here with us today before the LORD our God, and with whoever is not here with us today.

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

For ye know how we have dwelt in the land of Egypt,.... How long they and their fathers had dwelt there, the number of years they had been in the land, as the Targum of Jonathan, which was upwards of two hundred years; and being a country the inhabitants of which were much given to idolatry, they had seen many of their idols, and much...

Geneva Bible Notes Reformed @genevanotes

But with [him] that standeth here with us this day before the LORD our God, and also with [him] that [is] not here with us this day: (h) Meaning, their posterity.