C. F. Keil and Franz Delitzsch on Deuteronomy 29:10

Deu 29:10

“To-day,” when the covenant-law and covenant-right were laid before them, the whole nation stood before the Lord without a single exception - the heads and the tribes, the elders and the officers, all the men of Israel. The two members are parallel. The heads of the people are the elders and officers, and the tribes consist of all the men. The rendering given by the lxx and Syriac (also in the English version: Tr.), “heads (captains) of your tribes,” is at variance with the language.