Numbers 3:15-17

King James Version

¹⁵ Number the children of Levi after the house of their fathers, by their families: every male from a month old and upward shalt thou number them.

¹⁶ And Moses numbered them according to the word of the Lord, as he was commanded.

¹⁷ And these were the sons of Levi by their names; Gershon, and Kohath, and Merari.