Numbers 3:9-11 New Revised Standard Version, Anglicised (NRSVA)
9 You shall give the Levites to Aaron and his descendants; they are unreservedly given to him from among the Israelites. 10 But you shall make a register of Aaron and his descendants; it is they who shall attend to the priesthood, and any outsider who comes near shall be put to death.
11 Then the Lord spoke to Moses, saying:
Numbers 3:9-11 New International Version (NIV)
9 Give the Levites to Aaron and his sons; they are the Israelites who are to be given wholly to him.[a] 10 Appoint Aaron and his sons to serve as priests; anyone else who approaches the sanctuary is to be put to death.”
11 The Lord also said to Moses,