Moses
Numbers 8:16ESV·traditional attribution

For they are wholly given to me from among the people of Israel. Instead of all who open the womb, the firstborn of all the people of Israel, I have taken them for myself.

John Calvin Reformed @genevareformer

16. For they are wholly given. Lest the other tribes should complain that the number of the people was diminished, God declares that the Levites were alienated from the race of Abraham, since He had acquired them to Himself when He smote all the first-born of Egypt; for it is certain that the first-born of the people, as well as those of their animals, were...

Matthew Henry Presbyterian @wholebiblehenry

We read before of the separating of the Levites from among the children of Israel when they were numbered, and the numbering of them by themselves (Num 3:6, Num 3:15), that they might be employed in the service of the tabernacle. Now here we have directions given for their solemn ordination (Num 8:6), and the performance of it, Num 8:20.

Commenting on Numbers 8:5-26

John Gill Reformed Baptist @doctorgill

For they are wholly given unto me from among the children of Israel,.... All of them, entirely, and most certainly; or, "given, given" (u), which is repeated for the confirmation of it; or because of their being twice given, first to the Lord by the children of Israel, and then by the Lord to Aaron and his sons, as Chaskuni; though Jarchi interprets it of...