About Tirmidhi:
Ab? ‘?sá Mu?ammad ibn ??sá as-Sulam? a?-?ar?r al-B?gh? at-Tirmidh? was a Persian Islamic scholar and collector of hadith who wrote al-Jami` as-Sahih (known as Jami` at-Tirmidhi), one of the six canonical hadith compilations in Sunni Islam. He also wrote Shama'il Muhammadiyah (popularly known as Shama'il at-Tirmidhi), a compilation of hadiths concerning the person and character of the Islamic prophet, Muhammad. At-Tirmidhi was also well versed in Arabic grammar, favoring the school of Kufa over Basra due to the former's preservation of Arabic poetry as a primary source.