Numbers 7:6-9

6So Moses took the wagons and oxen and presented them to the Levites.

7He gave two wagons and four oxen to the Gershonite division for their work,

8and he gave four wagons and eight oxen to the Merarite division for their work. All their work was done under the leadership of Ithamar son of Aaron the priest.

9But he gave none of the wagons or oxen to the Kohathite division, since they were required to carry the sacred objects of the Tabernacle on their shoulders.