Numbers 3:10-13 And you shall appoint Aaron and his sons, and they shall wait on their priest's office: and the stranger that comes near shall be put to death.

KJ2000⁽ⁱ⁾ ¹⁰ And you shall appoint Aaron and his sons, and they shall wait on their priest's office: and the stranger that comes near shall be put to death. ¹¹ And the LORD spoke unto Moses, saying, ¹² And I, behold, I have taken the Levites from among the children of Israel instead of all the firstborn that opens the womb among the children of Israel: therefore the Levites shall be mine; ¹³ Because all the firstborn are mine; for on the day that I struck all the firstborn in the land of Egypt I hallowed unto me all the firstborn in Israel, both man and animal: mine shall they be: I am the LORD.