Chapter on Water and Its Rules, and What is Permissible and Impermissible for Purification

The statement "everything whose meat is permissible to eat, its leftover water can be used for Wudu' and drinking" indicates that anything whose meat is not permissible to eat cannot be used for Wudu' or drinking. The condition that the animal's meat must be lawful to eat implies that any animal outside this category is the opposite and thus cannot be used for purification or consumption. This serves as a general rule.