And the LORD spake unto Moses, saying,
9And thou shalt give the Levites unto Aaron and to his sons: they are wholly given unto him out of the children of Israel.
10And thou shalt appoint Aaron and his sons, and they shall wait on their priest's office: and the stranger that cometh nigh shall be put to death.
11And the LORD spake unto Moses, saying,
12And I, behold, I have taken the Levites from among the children of Israel instead of all the firstborn that openeth the matrix among the children of Israel: therefore the Levites shall be mine;
13Because all the firstborn are mine; for on the day that I smote all the firstborn in the land of Egypt I hallowed unto me all the firstborn in Israel, both man and beast: mine shall they be: I am the LORD.
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