Numbers 8:16 (BSB)

For the Levites have been wholly given to Me from among the sons of Israel. I have taken them for Myself in place of all who come first from the womb, the firstborn of all the sons of Israel.

From Numbers 8. Also in the ESV.

Commentary on Numbers 8:16

• John Calvin (Reformed), Calvin's Commentaries on Numbers 8:16: 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), 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 8:16: 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...
• 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.