Then David said, None ought to carry the ark of God but the Levites: for them hath the LORD chosen to carry the ark of God, and to minister unto him for ever.
These were the sons of Levi after their fathers' houses, even the heads of the fathers' houses of those of them that were counted, in the number of names by their polls, who did the work for the service of the house of the LORD, from twenty years old and upward.
And when the tabernacle setteth forward, the Levites shall take it down: and when the tabernacle is to be pitched, the Levites shall set it up: and the stranger that cometh nigh shall be put to death.
Then the tent of meeting shall set forward, with the camp of the Levites in the midst of the camps: as they encamp, so shall they set forward, every man in his place, by their standards.