When Grape Juice Is Boiled by a Fire
Issue No.219- If grape juice boils by fire, it is not najis but it is haram to drink. However, if it boils so much that two-thirds of it evaporates and one-third is left, it will become halal. However, if it ferments by itself and becomes intoxicating, it is najis and haram and will become ṭāhir and halal to drink only when it turns into vinegar.
