Numbers 4:38-40

Young's Literal Translation

³⁸ And those numbered of the sons of Gershon, by their families, and by the house of their fathers,

³⁹ from a son of thirty years and upward even unto a son of fifty years, every one who is going in to the host, for service in the tent of meeting,

⁴⁰ even their numbered ones, by their families, by the house of their fathers, are two thousand and six hundred and thirty.