Islamic Manual

Leftover water and food: pure, disliked, doubtful or impure

Whose leftover water or food (jutha) is pure, which are merely disliked, which are doubtful, and which are impure.

"Leftover" (jutha) means water or food that has already touched someone's or something's mouth. Whether you can still use it depends on whose mouth touched it.

Leftover water or food
Whose leftover Can you use it?
A person, anyone at all, as long as they haven't just had something impure like alcohol Yes, it's pure
A horse, a lawful farm animal or bird, a fish or other water animal, or a small creature without flowing blood Yes, it's pure
A cat, rat, lizard, crow, hawk, or a chicken or cow that eats filth Better not to, but it isn't impure, just disliked
A mule (born from a female donkey) or a donkey Best to avoid it, since it's unclear
A pig, a dog, or an elephant No: it's impure

Jutha (leftover water or food) takes its ruling from whoever or whatever last touched it with their mouth.

Whose leftovers are pure, disliked, doubtful or impure
Category Whose leftoverRuling
Pure Any human being (Muslim or non-Muslim, male or female, junub or menstruating) provided they have not just consumed something impure such as alcohol or pork; horses; lawful animals, four-legged or birds; aquatic animals; and animals without flowing blood, whether lawful or unlawful to eatPure, and may be used
Makruh (disliked) Animals unlawful to eat that live indoors, such as cats, rats and lizards, and birds such as crows, hawks and eagles; also lawful animals that roam freely and eat whatever they find, such as stray chickens and filth-eating cows or buffaloes, as long as their mouths are not currently dirtied by itMakruh tanzeehi: better avoided, but not impure
Doubtful (mashkook) A mule born of a female donkey and a male horse; a donkeyBest avoided, out of caution
Impure Animals entirely unlawful to eat, such as pigs, dogs and elephantsImpure: cannot be used

A mule born of a female horse (rather than a female donkey) does not fall under the doubtful category.

Sunnahthe Prophet’s way

Human sweat is pure.

Sunnahthe Prophet’s way

The sweat and saliva of an animal follow the same ruling as its leftover: pure if the leftover is pure, and impure or doubtful if the leftover is impure or doubtful. The saliva from an elephant's trunk is impure.

Suʾr, leftover water or food, takes the ruling of whatever last touched it with its mouth.

The four categories of leftover (suʾr)
Category Whose leftoverRuling
Ṭāhir (pure) Any human being, Muslim or non-Muslim, male or female, junub or menstruating, provided they have not just consumed something impure such as alcohol or pork; the horse; lawful animals, quadruped or avian; aquatic creatures; and any creature without sāʾil (flowing) blood, whether lawful or unlawful to eatPure, and usable without qualification
Makrūh tanzīhī Unlawful animals kept indoors (cats, rats, lizards) and birds such as crows, hawks and eagles; also lawful free-roaming animals that eat whatever they find, such as stray chickens and jallālah (filth-eating) cattle, provided their mouths are not presently soiled by itDisliked, though not impure
Mashkūk (doubtful) A mule born of a female donkey and a male horse; the donkeyTo be avoided as a matter of caution, though not ruled impure outright
Najis (impure) Animals entirely unlawful to eat: the pig, the dog, the elephantImpure without qualification

A mule born of a female horse rather than a female donkey is expressly excluded from the doubtful category.

Ḥarāmmust not do

Where an animal whose leftover is normally pure has just consumed something impure and then puts its mouth to a pure item, that item becomes impure. Once sufficient time has passed for the mouth to be naturally cleansed, contact no longer transmits impurity: the example given is a cat that drinks immediately after eating a rat, which renders the liquid impure.

Sunnahthe Prophet’s way

Human sweat is ṭāhir.

Sunnahthe Prophet’s way

An animal's sweat and saliva carry the same ruling as its suʾr: pure where the suʾr is pure, and impure or doubtful where the suʾr is impure or doubtful. The saliva of an elephant's trunk is specifically ruled impure.

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