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.
Abu Hamza al-Thumali Thābit ibn Safiya famously known as Abū Hamzah al-Thumālī Thābit ibn Dīnār (Arabic: أبو حمزة الثمالي‎ ‎ ) was a close companion of Imam Ali Zayn al-Abidin.