Numbers 1:50

50 aBut appoint the Levites over the tabernacle of the testimony, and over all its furnishings, and over all that belongs to it. They are to carry the tabernacle and all its furnishings, and they shall take care of it band shall camp around the tabernacle.

Numbers 8:11

11and Aaron shall offer the Levites before the Lord as a wave offering from the people of Israel, that they may do the service of the Lord.

Numbers 8:15

15And after that the Levites shall go in to serve at the tent of meeting, when you have cleansed them and offered them as a cwave offering.

Numbers 8:24-26

24This applies to the Levites: dfrom twenty-five years old and upward they
Hebrew he; also verses 25, 26
shall come to do duty in the service of the tent of meeting.
25And from the age of fifty years they shall withdraw from the duty of the service and serve no more. 26They minister
Hebrew He ministers
to their brothers in the tent of meeting gby keeping guard, but they shall do no service. Thus shall you do to the Levites in assigning their duties.”

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