Evidence that the one who is content with Allah as his Lord, Islam as his religion and Muhammad (ﷺ) as his prophet, then he is a believer, even if he commits major sins

Sahih Muslim · Book 1 · Hadith 34

حَدَّثَنَا مُحَمَّدُ بْنُ يَحْيَى بْنِ أَبِي عُمَرَ الْمَكِّيُّ، وَبِشْرُ بْنُ الْحَكَمِ، قَالاَ حَدَّثَنَا عَبْدُ الْعَزِيزِ، - وَهُوَ ابْنُ مُحَمَّدٍ - الدَّرَاوَرْدِيُّ عَنْ يَزِيدَ بْنِ الْهَادِ، عَنْ مُحَمَّدِ بْنِ إِبْرَاهِيمَ، عَنْ عَامِرِ بْنِ سَعْدٍ، عَنِ الْعَبَّاسِ بْنِ عَبْدِ الْمُطَّلِبِ، أَنَّهُ سَمِعَ رَسُولَ اللَّهِ صلى الله عليه وسلم يَقُولُ…

It is narrated on the authority of 'Abbas b. 'Abdul-Muttalib that he heard the Messenger of Allah (ﷺ) saying: He has found the taste of faith (iman) who is content with Allah as his Lord, with Islam as his religion (code…