Link: The Importance of Aqidah
Author: Dr. Abdul Aziz al-Qari
The Messenger informed Mu’adh bin Jabal, when he was going to the land of Yemen, “You are going to a people from the People of the Book. Let the first thing that you call them to be the worship of Allah. If they acknowledge Allah, then inform them that Allah has obligated upon them five prayers during their days and nights.” [Al-Bukhari, Muslim] This hadith is clear. It does not require much of an explanation. The Prophet applied this principle in his practical calling to Islam. He stayed in Makkah for thirteen years to each the people iman and to educate his Companions on this point and to correct the beliefs of the people. That is the pattern upon which the Companions were brought up.
Jundub Ibn Abdullah al-Bajaly said, “We learned iman (faith) and then we learned the Quran and it increased our iman.”