Numbers 3:10-12

Complete Jewish Bible

¹⁰ You are to appoint Aharon and his sons to carry out the duties of cohanim; anyone else who involves himself is to be put to death.”

¹¹ Adonai said to Moshe, ¹² “I have taken the L’vi’im from among the people of Isra’el in lieu of every firstborn male that is first from the womb among the people of Isra’el; the L’vi’im are to be mine.