Moses
Deuteronomy 31:7ESV·traditional attribution

Then Moses summoned Joshua and said to him in the sight of all Israel, “Be strong and courageous, for you shall go with this people into the land that the LORD has sworn to their fathers to give them, and you shall put them in possession of it.

John Calvin Reformed @genevareformer

7 And Moses called unto Joshua. It hence appears that those, upon whom a public charge is conferred, have need of a twofold confirmation: for, after having addressed a general instruction to the whole people, he directs his discourse peculiarly to Joshua himself, as to one whose business it was to set an example of bravery to others, and whom severe contests awaited.

Matthew Henry Presbyterian @wholebiblehenry

Loth to part (we say) bids oft farewell. Moses does so to the children of Israel: not because he was loth to go to God, but because he was loth to leave them, fearing that when he had left them they would leave God.

Commenting on Deuteronomy 31:1-8

John Gill Reformed Baptist @doctorgill

And the Lord, he it is that doth go before thee,.... The Word of the Lord, his Shechinah, according to the above Targum, and so in the next clause; the same that brought Israel out of Egypt, had gone before them in the wilderness, and now would go before Joshua and them into the land of Canaan: he will be with thee; to guide and...