What do Ibn al-Shatir and Ibn Tufail have in common?
Ibn Tufail Ibn Tufail (c. 1105 – 1185) (full Arabic name: أبو بكر محمد بن عبد الملك بن محمد بن طفيل القيسي الأندلسي "Abu Bakr Muhammad ibn Abd al-Malik ibn Muhammad ibn Tufail al-Qaisi al-Andalusi"; Latinized form: "Abubacer Aben Tofail"; Anglicized form: "Abubekar" or "Abu Jaafar Ebn Tophail") was a Moorish Andalusian Muslim polymath: a writer, novelist, Islamic philosopher, Islamic theologian, physician, astronomer, vizier, and court official.
Kumayl ibn Ziyad Kumayl bin Ziyad an-Nakha'i (Arabic: كُميل بن زياد النخعي‎ ‎ ) was among the most loyal companions of Imam Ali Ibn Abi Talib. Moreover, Kumayl occupies a prominent position in Shia Islam. Converting to Islam during the time of Islamic prophet Muhammad, he rose to a position of prominence during the caliphates of Uthman and Ali. In the caliphate of Ali, Kumayl flourished and served him in the most disciplined of ways. However, he is recognized for his pious and humble nature as well as preserving Imam Ali's teachings. Kumayl is best known for the "du'a" (supplication) of Prophet Khidr, which is commonly known by the name "du'a Kumayl."