Numbers 4:29

As for the sons of Merari, thou shalt number them after their families, by the house of their fathers;
— Numbers 4:29, King James Version

In other translations

World English Bible (WEB)

As for the sons of Merari, you shall number them by their families, by their fathers' houses;

American Standard Version (ASV)

As for the sons of Merari, thou shalt number them by their families, by their fathers’ houses;

Young's Literal Translation (YLT)

'The sons of Merari, by their families, by the house of their fathers, thou dost number them;