Numbers 3:15-17

Young's Literal Translation

¹⁵ `Number the sons of Levi by the house of their fathers, by their families; every male from a son of a month and upward thou dost number them.'

¹⁶ And Moses numbereth them according to the command of Jehovah, as he hath been commanded.

¹⁷ And these are sons of Levi by their names: Gershon, and Kohath, and Merari.