1 Samuel 6:5-9

Wherefore ye shall make images of your tumors, and images of your mice that mar the land; and ye shall give glory unto the God of Israel: peradventure he will lighten his hand from off you, and from off your gods, and from off your land. Wherefore then do ye harden your hearts, as the Egyptians and Pharaoh hardened their hearts? When he had wrought wonderfully among them, did they not let the people go, and they departed? Now therefore take and prepare you a new cart, and two milch kine, on which there hath come no yoke; and tie the kine to the cart, and bring their calves home from them; and take the ark of Jehovah, and lay it upon the cart; and put the jewels of gold, which ye return him for a trespass-offering, in a coffer by the side thereof; and send it away, that it may go. And see; if it goeth up by the way of its own border to Beth-shemesh, 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.