Numbers 4:48

46 All the numbered men of the Levites, whom Moses and Aaron and the leaders of Israel numbered, by their families and by their fathers' households,

47 from thirty years and upward even to fifty years old, everyone who could enter to do the work of service and the work of carrying in the tent of meeting.

48 Their numbered men were 8,580 .

49 According to the commandment of the LORD through Moses, they were numbered, everyone by his serving or carrying; thus these were his numbered men, just as the LORD had commanded Moses.