AKJV(i)
14 Thus shall you 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 do the service of the tabernacle of the congregation: and you shall 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 firstborn of all the children of Israel, have I taken them to me.