1 Samuel 6:7-8

7Now then, take and 1prepare a new cart and two milk cows on which there 2has never been a yoke; and hitch the cows to the cart and take their calves back home, away from them.

8Then take the ark of the Lord and place it on the cart; and put 3the articles of gold which you return to Him as 4a guilt offering in a saddlebag by its side. Then send it away that it may go.