Numbers 4:44

42Those who were counted of the families of the sons of Merari, by their families, by their fathers’ houses,

43from thirty years old and upward even to fifty years old—everyone who entered into the service for work in the Tent of Meeting,

44even those who were counted of them by their families, were three thousand two hundred.

45These are those who were counted of the families of the sons of Merari, whom Moses and Aaron counted according to the commandment of the LORD by Moses.

46All those who were counted of the Levites whom Moses and Aaron and the princes of Israel counted, by their families and by their fathers’ houses,