Introduction

Anwar al-Tanzil wa Asrar al-Ta'wil (The Lights of Revelation and the Secrets of Interpretation) is one of the most widely studied works of classical Quranic exegesis, composed by Qadi Nasir al-Din Abu Sa'id 'Abd Allah ibn 'Umar al-Baydawi (d. circa 685 AH / 1286 CE). Al-Baydawi was a prominent Shafi'i jurist and theologian from Fars province in Persia who served as chief judge (qadi al-qudat) of Shiraz. In addition to his tafsir, he produced significant works in jurisprudence, the principles of Islamic law, and Ash'ari theology, establishing himself as a comprehensive scholar within the Sunni intellectual tradition.

Anwar al-Tanzil was largely based on the earlier Quranic commentary al-Kashshaf by the Mu'tazilite scholar al-Zamakhshari (d. 538 AH), but al-Baydawi undertook a thorough revision of his source in two critical respects. First, he condensed al-Zamakhshari's expansive discussions into a more manageable format while preserving the linguistic and rhetorical insights that made al-Kashshaf celebrated. Second — and more importantly — he systematically corrected the theological positions in al-Kashshaf that reflected Mu'tazilite doctrine, replacing them with explanations consistent with Ash'ari theology, the dominant creedal school of Ahl us-Sunnah wal-Jama'ah in the Shafi'i and Maliki traditions.

The methodology of the commentary is predominantly linguistic and rhetorical. Al-Baydawi devoted sustained attention to the grammatical analysis of Quranic Arabic, including I'rab (syntactic parsing), the identification of rhetorical figures (balaghah), and the range of lexical meanings available for key terms. He also incorporated discussions of variant readings (qira'at) and the occasions of revelation (asbab al-nuzul) where they bear on the meaning of verses. This multi-layered approach made the tafsir an indispensable reference for students seeking to understand not only what the Quran says but how the Arabic language communicates its meanings.

After its composition, Anwar al-Tanzil rapidly became the premier tafsir text in the Ottoman madrasa curriculum. It served as the standard commentary studied in advanced courses on Quranic sciences throughout the empire, and it attracted a large body of supercommentaries (hawashi), with scholars such as Shaykhzadeh, al-Qunawi, and Ibn al-Tamjid producing detailed annotations that addressed its interpretive choices and theological arguments. This tradition of annotation ensured that engagement with al-Baydawi's work remained intellectually alive across centuries of Islamic learning.

For students of Ahl us-Sunnah wal-Jama'ah, Anwar al-Tanzil offers a model of tafsir that integrates rigorous linguistic analysis with sound Ash'ari theology. It demonstrates how classical scholars navigated the relationship between the Arabic sciences and doctrinal commitments in interpreting the Quran, and it remains an essential reference for anyone seeking to engage seriously with the classical tafsir tradition. While later works have supplemented its discussions, al-Baydawi's commentary retains its authority as a benchmark of scholarly tafsir writing and a gateway into the broader world of Quranic interpretation.