Numbers 4:35-37

Young's Literal Translation

³⁵ 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,

³⁶ and their numbered ones, by their families, are two thousand seven hundred and fifty.

³⁷ These [are] those numbered of the families of the Kohathite, every one who is serving in the tent of meeting, whom Moses and Aaron numbered, by the command of Jehovah, by the hand of Moses.