1 Samuel 6:7-9

7Now therefore make a new cart, and take two milk cows, on which there hath come no yoke, and tie the cows to the cart, and bring their calves home from them: 8And take the ark of the LORD, and lay it upon the cart; and put the jewels of gold, which ye return to him for a trespass offering, in a box by its side; and send it away, that it may go. 9And see, if it goeth up by the way of its own land to Bethshemesh, then he hath done us this great evil: but if not, then we shall know that it is not his hand that smote us: it was a chance that happened to us.1