Ibn Yaish
- Died
- 643 AH
- Born in
- Aleppo
Ibn Yaish (553–643 AH / 1158–1245 CE) was an Arab grammarian and philologist of Mosul origin who lived and taught in Aleppo, best known for his monumental commentary Sharh al-Mufassal.
Name and Early Life
His full name was Yaish ibn Ali ibn Yaish ibn Abi al-Saraya Muhammad ibn Ali ibn al-Mufaddal al-Asadi. He held the kunya Abu al-Baqa and the honorific title Muwaffaq al-Din, and was traditionally known as Ibn al-Sa'igh (and in one reading noted by al-Suyuti, Ibn al-Sani'). Although his family originated from Mosul, he was born and raised in Aleppo. He was born on 3 Ramadan 553 AH (1158 CE), though another report places his birth in 556 AH.
Education and Travels
Ibn Yaish studied Arabic grammar in Aleppo under Abu al-Sakha Fityan al-Halabi and Abu al-Abbas al-Maghribi al-Nayruzi. In his youth, he set out for Baghdad seeking to study under the eminent grammarian Abu al-Barakat Ibn al-Anbari, but upon reaching Mosul he received news of Ibn al-Anbari's death. He remained in Mosul for a period to study hadith under Abu al-Fadl Abd Allah ibn Ahmad al-Tusi and Abu Muhammad Abd Allah ibn Umar ibn Suwayda al-Takriti, in addition to hearing hadith in Aleppo from teachers including Yahya ibn Mahmud al-Thaqafi and Abu al-Hasan Ahmad ibn Muhammad al-Tarsusi.
Before establishing his own teaching circle, he traveled to Damascus to meet the scholar Taj al-Din al-Kindi. During their encounter, Ibn Yaish posed intricate grammatical questions, including the grammatical analysis (i'rab) of a perplexing phrase from the tenth maqama of al-Hariri, leaving al-Kindi uncertain of the answer. Recognizing Ibn Yaish's mastery, al-Kindi wrote a formal commendation praising his standing in the Arabic language.
Teaching and Scholarly Standing
Ibn Yaish settled permanently in Aleppo, dedicating his life to teaching grammar and philology, where he became the city's foremost authority in Arabic linguistics. A large number of students and Aleppo dignitaries studied under him. Among his prominent students were the biographer Ibn Khallikan—who read most of Ibn Jinni's al-Luma' under his instruction—the historian Ibn al-Adim, Baha' al-Din Ibn al-Nahhas and his brother Ishaq, and Abu Bakr al-Dashti.
Biographers described him as patient in instruction, lucid in explanation, deeply versed in linguistic transmission, witty and good-humored, while maintaining personal dignity and gravitas. Ibn al-Qifti praised his mastery of grammar, rhetoric, and equity.
In grammatical doctrine, Ibn Yaish engaged extensively with the schools of Basra, Kufa, and Baghdad, frequently championing the views of the Basran grammarians while drawing upon Baghdad authorities like Abu Ali al-Farisi. At around seventy years of age, he composed his primary masterpiece, Sharh al-Mufassal, an exhaustive commentary clarifying the obscurities and providing rationales and proofs for al-Zamakhshari's grammar treatise al-Mufassal. He also authored Sharh al-Tasrif al-Muluki, a commentary on Ibn Jinni's work on morphology.
Death
Ibn Yaish died in Aleppo on 25 Jumada al-Ula 643 AH (18 October 1245 CE) at the age of ninety. He was buried in the city at the shrine attributed to the prophet Ibrahim.
Answer updated
List of Works
Sharh al-Mufassal (Commentary on al-Mufassal) is an extensive Arabic grammatical commentary on al-Zamakhshari's al-Mufassal fi San'at al-I'rab. It serves as a comprehensive reference work on Arabic grammar and morphology, designed to explain the obscure phrasing of the original treatise, clarify its ambiguities, and provide the underlying proofs and rationales for each grammatical rule.