The Three-Tier Structure
Islamic criminal law does not have a single penalty system. It operates through three distinct tiers with different purposes and evidentiary requirements:
Hudud: Fixed punishments for specific offenses mentioned in revelation. The fixity is their defining feature — the judge cannot reduce or increase them. But the evidentiary threshold for conviction is extremely high.
Qisas: Retaliation for homicide and bodily harm. The distinctive feature: it is a right of the victim or their family, not the state. The victim’s family controls the outcome — they can demand retaliation, accept diya (blood money), or forgive the perpetrator entirely.
Ta’zir: Everything else. Discretionary punishment set by the judge based on the severity of the offense and the circumstances of the offender. Most criminal justice in classical Islamic courts operated through ta’zir.
The Near-Impossibility of Hudud Convictions
Classical jurists consistently interpreted the evidentiary requirements for hudud in the most restrictive possible direction. The principle al-hudud tudra’ bil-shubuhat (“hudud punishments are warded off by doubts”) is explicit: any ambiguity, any reasonable alternative explanation, any technical deficiency in the evidence — and the hudud punishment cannot be applied.
For zina: four adult, sane, upright Muslim male witnesses who directly observed the act of penetration are required. The probability of four reliable witnesses simultaneously observing a private sexual act is near zero. The confession alternative was also carefully hedged: the accused could retract a confession and the punishment could not proceed.
Classical scholars understood this structure as intentional: the social deterrence of the law’s existence was the goal, not the frequency of its application.
Modern Context
The 20th century saw several states implement “shariah criminal law” that departs significantly from this classical structure, typically lowering evidentiary standards and expanding the scope of hudud. Classical scholars have often been critical of these implementations, noting that they violate the traditional evidentiary protections that made classical hudud nearly unapplicable.
See also: Fiqh Al Ahkam Al Khamsah, Fiqh Al Qiyas Al Fiqhi, Fiqh Al Istislah, Fiqh Al Waqf, Fiqh Al Istihsan