مسائل المنتخبه (Articles Of Islamic Acts) - الخوئي، السيد أبوالقاسم - الصفحة ١٣ - ORDERS REGARDING WATER

while it is raining and in all these cases the change which took place in it is eliminated that water becomes pure. However, on the basis of recommended precaution rain water or Kurr-water or running water should get mixed with it.
٥٤. If an impure thing is purified in Kurr-water or running water the water, which falls from it, after the washing with which it becomes pure, is pure.
٥٥. The water, which was pure, and it is not known whether or not it has become impure, is pure; and the water, which was impure and it is not known whether or notit has become pure, is impure.
٥٦. The leavings of a dog, a pig and an infidel, who is not one of the people of the Book, and on the basis of obligatory precaution even the people of the Book(like Jews and Christians ), are impure and it is unlawful to eat or drink the same. However, the leavings of the animal whose meat is unlawful, are pure, and with theexception of cat, it is abominable to eat or drink the leavings of all such animals.