the leaders of Israel, the heads of their ancestral houses, presented an offering. They were the tribal leaders who supervised the registration.They brought as their offering before the Lord six covered carts and 12 oxen, a cart from every two leaders and an ox from each one, and presented them in front of the tabernacle.The Lord said to Moses,“ Accept these from them to be used in the work of the tent of meeting, and give this offering to the Levites, to each division according to their service.”So Moses took the carts and oxen and gave them to the Levites.