The differences between the denominations in Islam are primarily political and amplified after the Safavid invasion of Persia in the 1500s and the subsequent Safavid conversion of Iran to Shia Islam due to the politics between the Safavids and the Ottoman Empire.[199] Before that point Jafar al-Sadiq disapproved of people who disapproved of his great grand father Abu Bakr the first caliph.

Muhammad taught the Quran and advised his companions[200]

`Abd Allah bin Masud taught

Ali fourth caliph taught

Aisha Muhammad's wife and first caliphs daughter taught

`Abd Allah ibn `Abbas taught

Zaid bin Thabittaught

Umar second caliph taught

Abu Hurairahtaught

Alqama ibn Qays taught

Hussein ibn Alitaught

Qasim ibn Muhammad ibn Abu Bakr taught and raised by Aisha

Urwah ibn Zubayr taught by Aisha, he then taught

Said ibn al-Musayyibtaught

Abdullah ibn Umar taught

Ibrahim al-Nakha’i taught

Zayn al-Abidintaught

Hisham ibn Urwah taught

Ibn Shihab al-Zuhri taught

Salim ibn Abd-Allah ibn Umar taught

Hammad bin ibi Sulman taught

Muhammad al Baqir taught

Farwah bint al-Qasim Abu Bakr's great grand daughter Jafar's mother

Abu Hanifa wrote Al Fiqh Al Akbar [201]and Kitab Al-Athar, jurisprudence followed by Sunni, Zaidiyyah and originally by theFatimid and taught

Zayd ibn Alifollowed byZaidiyyah Shia

Ja'far al-Sadiq, Ali's and Abu Bakr's great grand son taught

Malik ibn Anas wrote Muwatta,[202]jurisprudence from early madina period now followed mostly by the Sunni in Africa and taught

Abu Yusuf wrote Usul al-fiqh

Muhammad al-Shaybani

Al-Shafi‘i wrote Al-Risala (book), jurisprudence and taught

Ismail ibn Ibrahim

Isma'il ibn Jafar followed byIsmaili Shia

Musa al-Kadhimfollowed byTwelver Shia

Ahmad ibn Hanbal wrote Musnad Ahmad ibn Hanbal, jurisprudence

Muhammad al-Bukhari wrote Sahih al-Bukhari.[194]

Muslim ibn al-Hajjaj wroteSahih Muslim[203]

Muhammad ibn `Isa at-Tirmidhi wroteJami` at-Tirmidhi[204]