Al-Fawz al-Kabir fi Usul at-Tafsir  - "The Great Victory, on Qur'anic Hermeneutics" is a manual of the principles and subtleties of Qur'anic tafsir.

In it, the author outlines the five fundamental sciences that the Qur'an contains:

• The science of polemics; Reminding others of the favours of Allah;
• The Reminder of Death and what is after it; and The Science of rulings.
• He also reviews the other sciences of tafsir such as the circumstances of revelation (asbab an-nuzul),
• Abrogating and abrogated ayat (an-nasikh wa'l-mansukh) and 
• The unusual words and phrases of the Qur'an (ghara'ib al-Qur'an),
• Before concluding the book by looking at the extraordinary and miraculous aspects of the Noble Book, and
• A final chapter on the meanings of the letters of the Arabic alphabet.