This is another article in the chapter Justice from the classical manual on Sharia called Reliance of the Traveller. The articles are posted one by one in the order they are given in the book.
02.0 INTENTIONALITY IN INJURIOUS CRIMES
02.1 Injurious crimes (0: of all types, whether killing or something less) are of three types:
(1) an honest mistake;
(2) a mistake made in a deliberate injury;
(3) or purely intentional.
02.2 An honest mistake is an act such as shooting an arrow at a wall and hitting a person (0: or shooting at a person and hitting someone else), or slipping from a height and falling on someone.
The criterion for it is that the act is intended but not the person, or neither the act nor the person is intended.
02.3 A mistake made in a deliberate injury is when one intends an injury that is not generally fatal, such as hitting someone with a light stick in a nonvital spot (A: from which the person dies) and the like.
02.4 Purely intentional means to intend an injury of the type that is generally fatal, whether with a blunt instrument or a sharp one.