Numbers 7:4-9

Then the LORD said to Moses, “Receive their gifts, and use these oxen and wagons for transporting the Tabernacle. Distribute them among the Levites according to the work they have to do.” So Moses took the wagons and oxen and presented them to the Levites. He gave two wagons and four oxen to the Gershonite division for their work, and 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. But 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.