Zakat, Fasting, Hajj, and Key Furuq in Islamic Worship Law

Al-Furuq's treatment of distinctions in zakah, fasting, and hajj law is valuable for understanding why apparently similar acts or circumstances receive different legal rulings in these chapters of Islamic worship.

In zakah law, one of the important furuq is the distinction between zakah and other financial obligations like the kaffarah and the nafaqah (maintenance). zakah is due on wealth itself, based on the passage of time (hawl) and the wealth reaching the nisab, regardless of the owner's specific circumstances. The kaffarah is due as a consequence of a specific transgression. The nafaqah is due based on the relationship between persons and the relative means of the parties. These different bases generate different rules: zakah cannot be avoided by giving the wealth away just before the hawl is complete (if done with the intent to avoid zakah); kaffarah cannot be avoided by claiming inability without genuine effort to perform the prescribed expiation; nafaqah adjusts with changing circumstances. Al-Qarafi explains the principles that generate these differences.

In fasting law, the distinction between the fast that is invalidated (mufsad) and the fast that is merely weakened or incomplete is an important furuq. Certain acts — such as deliberate eating or drinking — fully invalidate the fast, requiring qada' and potentially kaffarah. Other acts — such as tasting food without swallowing or kissing one's spouse with control — may be disliked but do not invalidate the fast. Al-Qarafi analyzes why certain intrusions into the fast are more serious than others, connecting them to the nature of the fast as an act of complete spiritual restraint.

For hajj, al-Qarafi distinguishes between acts that invalidate the hajj entirely (fasad al-hajj), acts that require a blood sacrifice as compensation (dam), and acts that require neither but are disliked or prohibited during ihram. This three-tier structure — invalidity, compensatable violation, disliked act — reflects a principled assessment of how seriously each act undermines the ihram's sanctity. Al-Qarafi explains the principles that place each prohibited act in its appropriate category.

The distinction between the ihram prohibition on intercourse — which invalidates the hajj — and the ihram prohibition on cutting the hair or nails — which requires a blood sacrifice but does not invalidate the hajj — is explained through the principle that intercourse constitutes a fundamental violation of the ihram's character as a state of total ritual dedication, while other prohibitions, though serious, do not so fundamentally undermine the hajj's essence.

These furuq in worship law illustrate al-Qarafi's broader project: not merely cataloguing legal distinctions but revealing the coherent principles of Islamic legal reasoning that give the apparently diverse body of worship rulings a rational architecture.