Moses
Deuteronomy 14:2ESV·traditional attribution

For you are a people holy to the LORD your God, and the LORD has chosen you to be a people for his treasured possession, out of all the peoples who are on the face of the earth.

Matthew Henry Presbyterian @wholebiblehenry

Moses here tells the people of Israel, I. How God had dignified them, as a peculiar people, with three distinguishing privileges, which were their honour, and figures of those spiritual blessings in heavenly things with which God has in Christ blessed us. 1. Here is election: The Lord hath chosen thee, v: 2.

Commenting on Deuteronomy 14:1-21

John Gill Reformed Baptist @doctorgill

For thou art an holy people unto the Lord thy God,.... Set apart by him from all other people, and devoted to his worship and service, and many of them were sanctified and made holy in a special and spiritual sense; and therefore should not conform to the customs of Gentiles, whether in their extravagant mourning for the dead, or in their religious services; see...

Geneva Bible Notes Reformed @genevanotes

For thou [art] an holy people unto the LORD thy God, and the LORD hath chosen thee to be a peculiar people unto himself, above all the nations that [are] upon the earth. (a) Therefore you should not follow the superstition of the Gentiles.