Moses
Deuteronomy 32:9ESV·traditional attribution

But the LORD’s portion is his people, Jacob his allotted heritage.

John Calvin Reformed @genevareformer

9 For the Lord’s portion is his people. This is the main point, that God was moved by nothing but His own good pleasure to make so much of this people, who had been derived from a common origin with all others: for when he says, that Jacob was the portion of Jehovah, and the lot of His inheritance, he does not mean that there...

Matthew Henry Presbyterian @wholebiblehenry

Moses, having in general represented God to them as their great benefactor, whom they were bound in gratitude to observe and obey, in these verses gives particular instances of God's kindness to them and concern for them. 1. Some instances were ancient, and for proof of them he appeals to the records (Deu 32:7): Remember the days of old; that is, "Keep in remembrance the...

Commenting on Deuteronomy 32:7-14

John Gill Reformed Baptist @doctorgill

For the Lord's portion is his people, Jacob is the lot of his inheritance. This is the reason why the Lord so early provided a portion or inheritance for the children of Israel in the land of Canaan; because they were his part, his portion, his inheritance, which he chose by lot for himself, or allotted to himself; whom he chose to be his special...