Deuteronomy 22:1-3

If you see your kinsman’s ox or sheep wandering off loose, don’t look the other way as if you didn’t see it. Return it promptly. If your fellow Israelite is not close by or you don’t know whose it is, take the animal home with you and take care of it until your fellow asks about it. Then return it to him. Do the same if it’s his donkey or a piece of clothing or anything else your fellow Israelite loses. Don’t look the other way as if you didn’t see it.