Abu Bakr al-Khassaf (Arabic:أبو بكر الخصاف,Abu Bakr Al-Ḫaṣṣāf ) (died 874, full nameAbu-Bakr Ahmad Ibn-Amru ash-Shaybani al-Khassaf)was aHanafite law scholar at the court of the 14thAbbasid Caliphal-Muhtadi.

He is the author of a seminal work onQādī, known asأدب القاضي Adab al-qādī. A commentary on the work was written byal-Jaṣṣās in the 10th century.An English translation was published by G. P. Verbit in 2008.

Al-Ḫaṣṣāf is also the author of a Kitāb al-ḥiyal wa-l-maḫārij, a work on legalistic trickery orḥiyal, and akitāb aḥkām al-awqāf, on religious institutions orwaqf.

The earliest development of this field is theKitāb al-maḫārij fī l-ḥiyal ("book of evasion and trickery") byMuhammad al-Shaybani (d. 805). A more comprehensive treatment is theKitāb al-ḥiyal wa-l-maḫārijby Al-Khassaf.^[1]

• al-Khaṣṣāf, Adab al-qāḍī, ed. Farḥāt Ziyāda (Cairo: American University in Cairo Press, 1978)
• Abubakar Ahmad Ibn ‘Amr al-Khassaf, Kitab Ahkam al-Awqaf (Cairo: Diwan ‘Umum al-Awqaf al-Misriyyah, 1904)

• Peter C. Hennigan:al-Khaṣṣāf (d. 261/874).n: Oussama Arabi, David Stephan Powers, Susan Ann Spectorsky:Islamic Legal Thought. A Compendium of Muslim Jurists Brill Academic Pub, 2013,ISBN 978-90-04-25452-7
• Mathieu Tillier:Women before the qāḍī under the Abbasids. In:Islamic Law and Society. Vol. 16 (2009), S. 280–302.
• Tillier, Mathieu. (2009).Les cadis d’Iraq et l’État abbasside (132/750-334/945). Damascus: Institut français du Proche-Orient, 2009.
• Peter C Hennigan:The birth of a legal institution : the formation of the waqf in third-century A.H. Ḥanafī legal discourse. Brill, Leiden 2003,ISBN 90-04-13029-2.
• Ādāb al-Qāḍī : Islamic legal and judicial system. Aḥmad ibn ʻUmar Khaṣṣāf; ʻUmar ibn ʻAbd al-ʻAzīz Ṣadr al-Shahīd; Munir Ahmad Mughal
• Abū Bakr Aḥmad Ibn-ʿAmr Ibn-Muhair al-Ḫaṣṣāf aš-Šaibānī:Kitāb al-ḥiyal wa-l-maḫāriǧ. Ed. J. Schacht. Reprograf. Nachdr. der Ausg. Hannover 1923. Olms, Hildesheim 1968.
• Joseph Schacht (ed.): Das Kitāb al-hiial ual-mahāriǧ des Abū Bakr Aḥmad ibn ʿUmar ibn Muhair aš-Šaibānī-al-H̱aṣṣāf. Hannover, 1923 (Beiträge zur semitischen Philologie und Linguistik; 4)
• Christopher Melchert: Religious Policies of the Caliphs from al-Mutawakkil to al-Muqtadir, A H 232-295/A D 847-908. Islamic Law and Society, Vol. 3, No. 3 (1996), S. 316–342

• 870s deaths
• People from Baghdad
• Courtiers from the Abbasid Caliphate
• Hanafi fiqh scholars
• 9th-century jurists
• 9th-century Arab people

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