Numbers 3:20-22

Young's Literal Translation

²⁰ And the sons of Merari by their families [are] Mahli and Mushi; these are the families of the Levites, by the house of their fathers.

²¹ Of Gershon [is] the family of the Libnite, and the family of the Shimite; these are the families of the Gershonite.

²² Their numbered ones, in number, every male from a son of a month and upward, their numbered ones [are] seven thousand and five hundred.