Numbers 8:15 WBT

¹³  And thou shalt set the Levites before Aaron, and before his sons, and offer them [for] an offering to the LORD.

¹⁴  Thus shalt thou separate the Levites from among the children of Israel: and the Levites shall be mine.

¹⁵  And after that shall the Levites go in to perform the service of the tabernacle of the congregation: and thou shalt cleanse them, and offer them [for] an offering.

¹⁶  For they [are] wholly given to me from among the children of Israel; instead of such as open every womb, [even instead of] the first-born of all the children of Israel, have I taken them to me.

¹⁷  For all the first born of the children of Israel [are] mine, [both] man and beast: on the day that I smote every first-born in the land of Egypt I sanctified them for myself.