Whatever is severed from a living creature has the same ruling as its carcass.
His statement, “Whatever is severed from a living creature has the same ruling as its carcass,” is a juristic principle.
“Severed” means detached from a living animal.
His statement, “the same ruling as its carcass,” refers to purity and impurity, lawfulness and unlawfulness. Thus, whatever is severed from a human being is pure but unlawful, due to the inviolability of the human being and not because it is impure. Whatever is severed from a fish is pure and lawful. Whatever is severed from cattle is impure and unlawful, because its carcass is impure and unlawful. Our jurists—may Allah Most High have mercy on them—have, however, made two exceptions: (1)
The first is an animal pursued in the hunt. The Arabic term is in the passive sense, meaning prey that a group pursues but cannot catch in order to slaughter it. Instead, they strike it with their swords or daggers: one cuts off its leg, another cuts off its hand, and another cuts off its head, until it dies. There is no report concerning this from the Prophet, peace and blessings be upon him, except that it has been related from the Companions—may Allah be pleased with them. (2)
Imam Ahmad—may Allah have mercy on him—said: “They used to do this during their military expeditions and saw no harm in it.” The wisdom behind this—and Allah knows best—is that such pursued prey cannot be slaughtered. When it cannot be slaughtered, it becomes lawful by being wounded in any part of its body. Just as game is lawful when it is struck anywhere on its body and dies, so too is this pursued prey, for it is game, except that parts of it were severed before it died.