The Book of Faith
1/23. Chapter:
Clarifying that the religion is sincerity
Sahih Muslim
حَدَّثَنَا أَبُو بَكْرِ بْنُ أَبِي شَيْبَةَ، حَدَّثَنَا عَبْدُ اللَّهِ بْنُ نُمَيْرٍ، وَأَبُو أُسَامَةَ عَنْ إِسْمَاعِيلَ بْنِ أَبِي خَالِدٍ، عَنْ قَيْسٍ، عَنْ جَرِيرٍ، قَالَ بَايَعْتُ رَسُولَ اللَّهِ صلى الله عليه وسلم عَلَى إِقَامِ الصَّلاَةِ وَإِيتَاءِ الزَّكَاةِ وَالنُّصْحِ لِكُلِّ مُسْلِمٍ .
It is narrated on the authority of Jarir that he observed I gave pledge of allegiance to the Messenger of Allah (may peace and blessings be upon him) on the observance of prayer, payment of Zakat, and sincerity and well-wishing for every Muslim.
Reference : Sahih Muslim 56aIn-book reference : Book 1, Hadith 106USC-MSA web (English) reference : Book 1, Hadith 101