Moses
Deuteronomy 5:31BSB·traditional attribution

But you stand here with Me, that I may speak to you all the commandments and statutes and ordinances you are to teach them to follow in the land that I am giving them to possess.”

Matthew Henry Presbyterian @wholebiblehenry

Here, I. Moses reminds them of the agreement of both the parties that were now treating, in the mediation of Moses. 1. Here is the consternation that the people were put into by that extreme terror with which the law was given.

Commenting on Deuteronomy 5:23-33