Ibn-Sina
http://www.ediblewildfood.com/bios/ibn-sina.aspx
At an early age, his family moved to Bukhara where he studied Hanafi jurisprudence with Isma‘il Zahid and at about 13 years of age he studied medicine with a number of teachers.
jabir-ibn-hayyan
https://www.thefamouspeople.com/profiles/jabir-ibn-hayyan-33327.php
Jabir was entrusted under the tutelage of a reputed scholar, Harbi al-Himyari, who taught him mathematics, Quran, and several other subjects.
Jabir Ibn Hayyan, later on, was tutored by a Shi’ite Imam, Jafar Al-Sadiq who was closely associated with the Abbasids during Harun al-Rashid’s Caliphate
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Again, and I have highlighted this issue on many occasions, the libturds of our country unfortunately think of themselves as Alama, without even bothering, understanding and educating themselves on the subject before they open their mouth.
The institution of Madrassa was the building block of the Muslims culture and society where the citizens of Muslim states at early stage in their lives, were prepared not only be better citizens, contribute to their state but also, prepare them for hereafter.
This institution has systematically been targeted and reduced to what it has become now. It should be revived on the similar grounds it used to be, when Muslims ruled the world affairs.