Imam at-Tirmidhi

Muhammad ibn Isa at-Tirmidhi (209-279 AH / 824-892 CE) was the compiler of al-Jami (also known as Sunan at-Tirmidhi), one of the six canonical hadith collections. Born in Tirmidh (in present-day Uzbekistan), he traveled widely in search of hadith, studying under Imam al-Bukhari, Abu Dawud, and other prominent scholars. He became blind later in life but continued teaching and writing from memory.

At-Tirmidhi's collection is unique among the six canonical works for several reasons. After each hadith, he provides his own grading of the narration (sahih, hasan, daif, etc.), discusses which scholars have used it as evidence, and notes the different legal opinions of the companions and jurists on the topic. This makes his Jami both a hadith collection and a comparative fiqh reference. He is also credited with popularizing the hadith grading category of 'hasan' (good), which occupies a middle ground between sahih (authentic) and daif (weak).

His other notable works include ash-Shamail al-Muhammadiyyah, a beloved collection of hadith describing the physical appearance, character, and daily habits of the Prophet Muhammad. He also authored Kitab al-Ilal on hidden defects in hadith. He died in Tirmidh in 279 AH (892 CE). His contributions to hadith grading methodology and comparative jurisprudence make his collection an indispensable resource for Islamic scholarship.