Charles Ellicott Commentary Deuteronomy 33:1

"And this is the blessing, wherewith Moses the man of God blessed the children of Israel before his death." — Deuteronomy 33:1 (ASV)

Moses the man of God blessed the children of Israel. —The title man of God is here used for the first time. Its counterpart is to be found in Deuteronomy 34:5: Moses the servant of Jehovah died.

The more any man is a “servant to Jehovah,” the more is he a “man of Elohim” to his fellow-men. After Moses, Elijah and Elisha are more especially described by this title (“man of God”) in the Old Testament.

Blessed ... Israel before his death. —“And if not then, when should he?” (Rashi.)