Numbers 3:10-12

Wycliffe Bible

¹⁰ Soothly thou shalt ordain Aaron and his sons on the religion of priesthood; a stranger that nigheth for to minister, shall die. (And thou shalt ordain Aaron and his sons to serve in the priesthood; a stranger who cometh near to try to minister, shall be put to death.)

¹¹ And the Lord spake to Moses, saying,

¹² I have taken the Levites (out) of the sons of Israel for each first engendered (male) thing that openeth the womb in the sons of Israel; and the Levites shall be mine,