Numbers 7:1-2

1And it came to pass on the day that Moses had completed the setting up of the tabernacle, and had anointed it, and hallowed it, and all the furniture thereof, and the altar and all its utensils, and had anointed them, and hallowed them,

2that the princes of Israel, the heads of their fathers' houses, the princes of the tribes, they that were over them that had been numbered, offered;