Albert Barnes Commentary Deuteronomy 33:3

"Yea, he loveth the people; All his saints are in thy hand: And they sat down at thy feet; [Every one] shall receive of thy words." — Deuteronomy 33:3 (ASV)

“The people” are the twelve tribes, not the Gentiles; and his saints refer to God’s chosen people just before spoken of. Compare Deuteronomy 7:18, Deuteronomy 7:21; Exodus 19:6; Daniel 7:8–21.