Bamidbar 3:15-17

Orthodox Jewish Bible

¹⁵ Count the Bnei Levi by the bais of their avot, by their mishpekhot; every zachar from a month old and upward shalt thou number them.

¹⁶ And Moshe numbered them according to the command of Hashem, as he had been commanded.

¹⁷ And these were the Bnei Levi by their shmot: Gershon, Kehat, and Merari.