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.
Jewish Publication Society of America Version (JPS1917) - Numbers 8:16 >For they are wholly given unto Me from among the children of Israel; instead of all that openeth the womb, even the first-born of all the children of Israel, have I taken them unto Me.