Numbers 7:3
They brought as their offering before the LORD six covered carts and twelve oxen--an ox from each leader and a cart from every two leaders--and presented them before the tabernacle.

Numbers 7:5
"Accept these gifts from them, that they may be used in the work of the Tent of Meeting. And give them to the Levites, to every man according to his service."

2 Samuel 6:3
They set the ark of God on a new cart and brought it from the house of Abinadab, which was on the hill. Uzzah and Ahio, the sons of Abinadab, were guiding the new cart,