Numbers 7:2-6

2Then the leaders of Israel, the heads of families who were the tribal leaders in charge of those who were counted, made offerings. 3They brought as their gifts before the Lord six covered carts and twelve oxen—an ox from each leader and a cart from every two. These they presented before the tabernacle. 4The Lord said to Moses, 5“Accept these from them, that they may be used in the work at the tent of meeting. Give them to the Levites as each man’s work requires.” 6So Moses took the carts and oxen and gave them to the Levites.