1 Samuel 6:12

And the kine took the straight way to the way of Beth-shemesh, headed directly for the highway leading to the nearest city of Israel, just beyond the boundary, and went along the highway, keeping to the road, lowing as they went, because they wanted their calves, and turned not aside to the right hand or to the left, made no attempt to go back to their stalls; and the lords of the Philistines went after them unto the border of Beth-shemesh, to find out where the animals would take the ark. It was evident that the living God directed the course of the cart, and that it was He who had sent the punishment upon the Philistines. It may well be that this realization caused at least some of the Philistines to turn to the true God. Thus many a national calamity has, in the hands of God, been a means of making people realize their sinfulness and turn to the living God for their salvation.