45. The water of a well which springs forth from the earth, even though its quantity may be less than kurr, does not become najis owing to something najis falling in it, unless its colour, smell, or taste changes. However, it is recommended that in the event of certain najÁsah falling in it, a quantity of water should be drawn from the well. Details about this quantity have been elucidated in more detailed texts.
46. If najÁsah falls into a well and changes the smell, colour or taste of its water, it will become ÔÁhir as soon as the change vanishes. The recommended precaution is to wait till it is mixed with the fresh water springing from the earth.