Numbers 7:7-9

Young's Literal Translation

⁷ The two of the waggons and the four of the oxen he hath given to the sons of Gershon, according to their service,

⁸ and the four of the waggons and the eight of the oxen he hath given to the sons of Merari, according to their service, by the hand of Ithamar son of Aaron the priest;

⁹ and to the sons of Kohath he hath not given, for the service of the sanctuary [is] on them: on the shoulder they bear.