Numbers 4:2

"Take a total of the sons of Kohath from the midst of the Levites, by their houses and families

Other versions

King James Version

Take the sum of the sons of Kohath from among the sons of Levi, after their families, by the house of their fathers,

English Standard Version

"Take a census of the sons of Kohath from among the sons of Levi, by their clans and their fathers' houses,

New International Version

"Take a census of the Kohathite branch of the Levites by their clans and families.