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.
Tatbir Tatbir (Arabic: تطبير‎ ‎ ), also known as Talwar zani and Qama Zani in South Asia, is an act of mourning by some of Shia Muslims for the younger grandson of Muhammad, Husayn ibn Ali, who was killed along with his children, companions and near relatives at the Battle of Karbala by the Umayyad Caliph Yazid I. Tatbir is a contested issue among Shia. Most clerics deem it to be self-damage and hence Haram. However, a small minority of Shia do perpetuate the practice in defiance.