Deuteronomy 22:2-4

22:2 If the owner does not live near you or you do not know who the owner is, then you must corral the animal at your house and let it stay with you until the owner looks for it; then you must return it to him. 22:3 You shall do the same to his donkey, his clothes, or anything else your neighbor has lost and you have found; you must not refuse to get involved. 22:4 When you see your neighbor’s donkey or ox fallen along the road, do not ignore it; instead, you must be sure to help him get the animal on its feet again.