Variantly: "and he not cover it": and he not cover it properly — whence they ruled: If he covered it properly, he is exempt; if improperly, he is liable. If he covered it and another uncovered it, the second is liable. If partners covered a pit and one of them uncovered it, the second is liable. If it were uncovered and one of them knew of it, the one who knew of it is liable, and the other, exempt.