1 Samuel 6:9-12

9If they cross the border of our land and go to Beth-shemesh, we will know it was the Lord who brought this great disaster upon us. If they don’t, we will know it was not his hand that caused the plague. It came simply by chance.”

10So these instructions were carried out. Two cows were hitched to the cart, and their newborn calves were shut up in a pen.

11Then the Ark of the Lord and the chest containing the gold rats and gold tumors were placed on the cart.

12And sure enough, without veering off in other directions, the cows went straight along the road toward Beth-shemesh, lowing as they went. The Philistine rulers followed them as far as the border of Beth-shemesh.