This excerpt is from Ṣalāḥ al-Dīn al-ʿAlāʾī's (d. 761/1359) al-Majmūʿ al-Mudhhab fī Qawāʿid al-Madhhab, which is a two-volume collection of substantive legal canons and interpretive legal canons, and the third-oldest known Shāfiʿī canons collection from the Mamlūk era. Substantive legal canons (qawāʿid fiqhiyya) are short formulas expressing fundamental principles and doctrines of Islamic law, while interpretive legal canons (qawāʿid uṣūliyya) are principles for interpreting textual sources. This excerpt provides the first few pages excerpted from the author's Introduction.
For more, view the full print edition and read the commentary by Mariam Sheibani on the Islamic Law Blog.