Now, therefore, prepare one new cart with two milk cows that have never been yoked. Hitch the cows to the cart, but take their calves away and pen them up.

Numbers 19:2
"This is the statute of the law that the LORD has commanded: Instruct the Israelites to bring you an unblemished red heifer that has no defect and has never been placed under a yoke.

Deuteronomy 21:3
Then the elders of the city nearest the victim shall take a heifer that has never been yoked or used for work,

Deuteronomy 21:4
bring the heifer to a valley with running water that has not been plowed or sown, and break its neck there by the stream.

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,

Now therefore make a new cart, and take two milk cows, on which there has come no yoke, and tie the cows to the cart, and bring their calves home from them: