Numbers 7:3-8

3They brought as their gift before Adonai six covered carts and twelve oxen. A cart came from every two princes and an ox from each one of them. They presented them before the Tabernacle.

4Adonai spoke to Moses saying,

5“Accept these from them to use in the service of the Tent of Meeting. Give them to the Levites to use as each man’s work requires.”

6So Moses took the carts and the oxen and he gave them to the Levites.

7He gave two carts and four oxen to the sons of Gershon, as their work required,

8and four carts and eight oxen to the sons of Merari, as their work required, under the direction of Ithamar son of Aaron the kohen.