Numbers 8:14 (BSB)

In this way you shall separate the Levites from the rest of the Israelites, and the Levites will belong to Me.

From Numbers 8. Also in the ESV.

Commentary on Numbers 8:14

• Matthew Henry (Presbyterian), Matthew Henry's Complete Commentary on Numbers 8:5-26: 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.
• John Gill (Reformed Baptist), Exposition of the Old and New Testaments on Numbers 8:14: Thus shalt thou separate the Levites from among the children of Israel,.... By sprinkling the water of purification upon them; by offering sacrifices for them; by presenting them before the Lord, with the hands of the people of Israel put upon them; by offering and waving them before the Lord, and by setting them before Aaron and his sons, as their ministers: and the Levites...
• Jamieson-Fausset-Brown (Reformed), Commentary Critical and Explanatory on the Whole Bible on Numbers 8:14: and the Levites shall be mine--that is, exempt from all military duty or secular work--free from all pecuniary imposition and wholly devoted to the custody and service of the sanctuary.
• Keil & Delitzsch (Lutheran), Biblical Commentary on the Old Testament on Numbers 8:12-19: Num 8:12-19 The Levites were then to close this transfer of themselves to the Lord with a sin-offering and burnt-offering, in which they laid their hands upon the sacrificial animals. By this imposition of hands they made the sacrificial animals their representatives, in which they presented their own bodies to the Lord as a living sacrifice well-pleasing to Him.