Numbers 4:28-30

Complete Jewish Bible

²⁸ This is how the Gershon families are to serve in the tent of meeting, and they are to be under the direction of Itamar the son of Aharon the cohen.

²⁹ “As for the descendants of M’rari, take a census by clans and families ³⁰ of all those between thirty and fifty years old, all who will be in the corps doing the work of serving in the tent of meeting.