Numbers 3:21-23

Young's Literal Translation

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.

²³ The families of the Gershonite, behind the tabernacle, do encamp westward.