"Take a census of the sons of Kohath from among the children of Levi, by their families, by their fathers' house,
Numbers 4:2
Surrounding context
4:1 Then the LORD spoke to Moses and Aaron, saying:
4:2 "Take a census of the sons of Kohath from among the children of Levi, by their families, by their fathers' house,
4:3 from thirty years old and above, even to fifty years old, all who enter the service to do the work in the tabernacle of meeting.