Taharah and Purity in the Framework of Legal Maxims

Az-Zarqa's Sharh al-Qawa'id al-Fiqhiyyah applies its ninety-nine maxims across the full breadth of Islamic law, and the law of ritual purity (taharah) receives extensive illustration in his commentary. The genius of the legal maxims approach, as az-Zarqa demonstrates, is that a small number of abstract principles can clarify and unify thousands of specific rulings that might otherwise seem disconnected.

The maxim 'certainty is not removed by doubt' (al-yaqin la yazulu bil-shakk) — Article 4 of the Majalla and one of the five universal maxims — has its most immediate application in the law of taharah. Az-Zarqa explains the maxim first at the level of abstract principle, then traces its specific applications in purity law. A person certain of their wudu who later doubts whether it was broken retains the benefit of certainty and may pray without renewing their ablution. This rule is not arbitrary convenience but a principled application of the general maxim that law must be anchored in what is established, not in speculation.

Az-Zarqa pays particular attention to the practical dimensions of these maxims in a way that distinguishes his commentary from purely academic treatments. He discusses how courts and muftis should apply the certainty maxim when disputes arise about whether a person was in a state of purity at the time of a given act — for example, when a prayer is contested on grounds of alleged ritual impurity. The maxim provides the default rule: the established prior state governs unless there is clear evidence of a change.

The maxim 'hardship brings ease' (al-mashaqqah tajlib al-taysir) — Article 17 of the Majalla — receives detailed illustration through purity concessions. Az-Zarqa explains the legal concept of rukhsah (concession) systematically: a rukhsah is a relaxation of the primary ruling (azimah) granted because of a specific hardship, and it is bounded by the extent of the hardship. The permission to use tayammum instead of water, to wipe over footwear instead of washing the feet, and to pray sitting when standing is impossible — all are rukhsahs derived from this maxim.

Az-Zarqa also discusses the maxim 'harm is to be removed' (ad-darar yuzal) in the context of situations where the standard purification requirement would itself cause harm. Using cold water in extreme winter when no warm water is available, or using water when the skin condition makes contact with water injurious — these cases are governed by this maxim, which permits substitution of a less harmful alternative. The limitation is that the alternative must itself be one that the legal sources have recognized.

Through these applications, az-Zarqa shows that the law of taharah is not a mechanical set of rituals but a coherent system governed by intelligible principles that respond reasonably to human circumstances.