Moses
Numbers 8:9ESV·traditional attribution

And you shall bring the Levites before the tent of meeting and assemble the whole congregation of the people of Israel.

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

And thou shalt bring the Levites before the tabernacle of the congregation,.... Not without it, but within it, in the court of the tabernacle, at least at the door of it, where stood the altar of burnt offering, on which sacrifices for them were now to be offered: and thou shalt gather the whole assembly of the children of Israel together; the heads of the...

Jamieson-Fausset-Brown Reformed @jfbcommentary

thou shalt gather the whole assembly of the children of Israel together, &c.--As it was plainly impossible that the whole multitude of the Israelites could do this, a select portion of them must be meant. This party, who laid their hands upon the Levites, are supposed by some to have been the first-born, who by that act, transferred their peculiar privilege of acting as God's...