Joseph Benson's Commentary of the Old and New Testaments - Deuteronomy 33:1
Deuteronomy 33:1. The blessing wherewith Moses blessed Israel He is said to bless them, by praying to God with faith for his blessing upon them; and by foretelling the blessings which God would confer upon them. And Moses calls himself the man of God, that is, the servant or prophet of God, to acquaint them that the following prophecies were not his own inventions, but divine inspirations. read more
Albert Barnes' Notes on the Whole Bible - Deuteronomy 33:1
The title “the man of God” in the Old Testament is one who is favored with direct revelations, but not necessarily an official prophet. The occurrence of the title here is no doubt a token that the Blessing was not, as was the Song, transcribed by Moses himself. Compare Deuteronomy 31:27. read more