Numbers 7:3-5

Young's Literal Translation

³ yea, they bring their offering before Jehovah, six waggons covered, and twelve oxen -- a waggon for two of the princes, and an ox for one -- and they bring them near before the tabernacle.

⁴ And Jehovah speaketh unto Moses, saying,

⁵ `Receive from them, and they have been to do the service of the tent of meeting, and thou hast given them unto the Levites, each according to his service.'