Numbers 7:6

2the princes of Israel, the heads of their fathers’ houses, gave offerings. These were the princes of the tribes. These are they who were over those who were counted;

3and they brought their offering before the LORD, six covered wagons and twelve oxen; a wagon for every two of the princes, and for each one an ox. They presented them before the tabernacle.

4The LORD spoke to Moses, saying,

5“Accept these from them, that they may be used in doing the service of the Tent of Meeting; and you shall give them to the Levites, to every man according to his service.”

6Moses took the wagons and the oxen, and gave them to the Levites.

7He gave two wagons and four oxen to the sons of Gershon, according to their service.

8He gave four wagons and eight oxen to the sons of Merari, according to their service, under the direction of Ithamar the son of Aaron the priest.

9But to the sons of Kohath he gave none, because the service of the sanctuary belonged to them; they carried it on their shoulders.

10The princes gave offerings for the dedication of the altar in the day that it was anointed. The princes gave their offerings before the altar.