Numbers 4:46-49

46All who were numbered of the Levites, whom Moses, Aaron, and the leaders of Israel numbered by their families and by their clans,

47from thirty years old and upward to fifty years old, everyone who entered to do the work of service and the work of carrying relating to the tent of meeting –

48those of them numbered were 8,580.

49According to the word of the Lord they were numbered, by the authority of Moses, each according to his service and according to what he was to carry. Thus were they numbered by him, as the Lord had commanded Moses.