Numbers 7:4

7:3 And they brought their offering before the LORD, six covered carts and twelve oxen, a cart for every two of the leaders, and for each one an ox; and they presented them before the tabernacle.

7:4 Then the LORD spoke to Moses, saying,

7:5 "Accept these from them, that they may be used in doing the work of the tabernacle of meeting; and you shall give them to the Levites, to every man according to his service."