What do Ibn al-Shatir and Ibn Tufail have in common?
Ibn al-Shatir Ibn al-Shatir or Ibn ash-Shatir (Arabic: ابن الشاطر‎ ‎ ; 1304–1375) was an Arab astronomer. He worked as "muwaqqit" (موقت, religious timekeeper) in the Umayyad Mosque in Damascus and constructed a sundial for its minaret in 1371/72.
Al-Tirmidhi Abū ‘Īsá Muḥammad ibn ‛Īsá as-Sulamī aḍ-Ḍarīr al-Būghī at-Tirmidhī (Arabic: أبو عيسى محمد بن عيسى السلمي الضرير البوغي الترمذي‎ ‎ ; Persian: ‎ ‎ , "Termezī"; 824 – 9 October 892), often referred to as Imām at-Termezī/Tirmidhī, 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.