Taharah Through Hanafi Legal Maxims

Ibn Nujaym's Ashbah wan-Naza'ir applies its legal maxims to the chapter of taharah with distinctively Hanafi results, often diverging from the Shafi'i applications of the same maxims documented by as-Suyuti. These divergences illuminate the genuinely different methodological commitments of the two schools.

The Hanafi school's application of the maxim 'certainty is not removed by doubt' in the context of wudu produces the same general result as in the Shafi'i school: a person who is certain of their wudu and doubts its nullification remains in a state of purity. However, the Hanafi school has a number of specific wudu nullifiers that the Shafi'i school does not recognize, and the maxim operates against this different background. The Hanafi school holds that bleeding, vomiting in a large quantity, losing consciousness, and laughing audibly during prayer all break wudu. When doubt arises about whether any of these have occurred, the maxim of certainty resolves the doubt in favor of the earlier certain state.

The Hanafi treatment of water classification shows distinctive features. The Hanafi school does not use the two-qullah threshold in the same way as the Shafi'i school. Instead, Hanafi jurisprudence distinguishes between flowing water (ma' jar) — which is generally treated as large and thus resistant to impurity — and standing water (ma' rakid), where the threshold is calculated differently. Ibn Nujaym explains these distinctions through the maxim that rules follow their effective causes, showing that the nature of water (flowing versus standing) is the legally relevant factor.

On the purification of vessels licked by a dog, the Hanafi position differs from the Shafi'i: the Hanafi school requires three washings with clean water (not seven with one using earth), based on a different assessment of the hadith evidence and a different application of the principle that purification requirements should be proportionate to the impurity. Ibn Nujaym explains this as an application of the maxim that rulings should not exceed what the legal evidence supports.

The maxim 'custom is authoritative' has a notably broader application in Hanafi fiqh than in the Shafi'i school, and its application to taharah is instructive. What counts as 'dirt' on the body that must be removed before wudu, what constitutes 'covering' the body parts required to be covered, and what types of substances on a surface disqualify it as a place of prayer — all these are determined in part by customary usage and widespread convention, subject to the principle that custom does not override an explicit textual ruling.

The principle of istihsan (juristic preference) — one of the characteristic Hanafi tools not officially recognized by the Shafi'i school — appears in several taharah rulings that Ibn Nujaym discusses. Istihsan permits the Hanafi jurist to depart from the strict result of analogical reasoning when that result would produce an unacceptably harsh or inconvenient outcome. In taharah law, this principle operates in cases where the strict analogy would impose purification requirements that are practically burdensome without clear textual support.