Deuteronomy 27:1

Here is, I. A general charge to the people to keep God's commandments; for in vain did they know them, unless they would do them. This is pressed upon them, 1. With all authority. Moses with the elders of Israel, the rulers of each tribe (Deu 27:1), and again, Moses and the priests the Levites (Deu 27:9); so that the charge is given by Moses who was king in Jeshurun, and by their lords, both spiritual and temporal, in concurrence with him. Lest they should think that it was Moses only, an old and dying man, that made such ado about religion, or the priests and Levites only, whose trade it was to attend religion and who had their maintenance out of it, the elders of Israel, whom God had placed in honour and power over them, and who were men of business in the world and likely to be so long so when Moses was gone, they commanded their people to keep God's law. Moses, having put some of his honour upon them, joins them in commission with himself, in giving this charge, as Paul sometimes in his epistles joins with himself Silvanus and Timotheus. Note, All that have any interest in others, or power over them, should use it for the support and furtherance of religion among them.

— Matthew Henry's Concise Commentary (public domain)