1 Samuel 6:10-12

10Then the men did so: they took two milk cows and hitched them to the cart, and shut in their calves at home. 11And they put the ark of the Lord on the cart, and the saddlebag with the gold mice and the likenesses of their tumors. 12Now the cows went straight in the 1direction of 2Beth-shemesh; they went on 3the same road, bellowing as they went, and did not turn off to the right or to the left. And the governors of the Philistines followed them to the border of Beth-shemesh.