Commercial Law and Marriage in Kashshaf al-Qina

Al-Buhuti's treatment of commercial law and marriage in Kashshaf al-Qina presents the Hanbali school's positions on these practically central areas of Islamic law with the comprehensiveness and authority that have made the work the primary Hanbali legal reference in Saudi Arabia and beyond.

In commercial law, Kashshaf al-Qina addresses the Hanbali school's conditions for valid sales with attention to the distinctive features of Hanbali commercial jurisprudence. The school's broad application of the prohibition of gharar (excessive uncertainty) means that contracts with uncertain subject matter, price, or delivery terms are more likely to be invalidated in the Hanbali school than in other schools. Al-Buhuti presents the evidential basis for this strict approach and its applications to specific contract types.

The Hanbali school's treatment of option clauses (khiyar) is addressed in Kashshaf al-Qina. The school permits option clauses for specified periods without the Hanafi school's three-day maximum, based on the prophetic permission for options without specifying a limit. Al-Buhuti also addresses the option of inspection (khiyar al-ru'yah) and the option of defect (khiyar al-'ayb), which protect buyers from undisclosed problems with the goods they purchase.

The istisnaa' contract (manufacture for specific order) is presented in Kashshaf al-Qina as permissible based on widespread commercial practice and the Hanbali school's recognition of 'urf (custom) as a legitimating factor for commercially necessary contracts. The conditions — specification of the manufactured item, agreed price, and reasonable completion time — are presented as the standard Hanbali requirements for this contract type.

Partnership law (sharikah) in Kashshaf al-Qina covers the Hanbali school's recognition of multiple partnership forms. The mudharabah (capital-labor partnership) is presented with its conditions: the capital provider furnishes the investment, the working partner provides expertise and labor, and profits are divided by agreed proportion. Losses are borne entirely by the capital provider (unless the working partner is negligent), following the prophetic framework for this partnership structure.

Marriage law in Kashshaf al-Qina presents the Hanbali school's comprehensive framework for nikah. The guardian requirement is absolute: no valid marriage without a wali. Al-Buhuti presents the order of guardianship, the conditions under which guardianship transfers to the next in line, and the role of the judge as guardian of last resort when no qualified male guardian is available.

The sections on divorce law in Kashshaf al-Qina are among the most detailed in the work. Al-Buhuti addresses talaq, khul', faskh (judicial annulment), ila' (oath of abstention), dhihar (injurious comparison), and li'an (oath of mutual imprecation in adultery cases) — the full range of mechanisms by which marriages may be dissolved in Islamic law. His systematic treatment of each mechanism, its conditions, and its effects on the 'iddah and the children makes Kashshaf al-Qina the authoritative Hanbali reference for family law disputes.

Kashshaf al-Qina's enduring relevance — used daily in Saudi courts, fatwa councils, and Islamic educational institutions — is a testament to al-Buhuti's achievement in synthesizing the Hanbali tradition into a single comprehensive and practically usable reference.