from 'Abdur-Rahman bin 'Abdullah bin Mas'ud that he narrated from his father, from the Prophet (ﷺ) who said: "May Allah beautify a man who hears a saying of mine, so he understands it, remembers it, and conveys it. Perhaps he carries the Fiqh to one who has more understanding than him. There are three with which the heart of a Muslim shall not be deceived. Sincerity in deeds for Allah, giving Nasihah to the A'immah of Muslims, and sticking to the Jama'ah. For indeed the call is protected from behind them."
حَدَّثَنَا ابْنُ أَبِي عُمَرَ، حَدَّثَنَا سُفْيَانُ، عَنْ عَبْدِ الْمَلِكِ بْنِ عُمَيْرٍ، عَنْ عَبْدِ الرَّحْمَنِ بْنِ عَبْدِ اللَّهِ بْنِ مَسْعُودٍ، يُحَدِّثُ عَنْ أَبِيهِ، عَنِ النَّبِيِّ صلى الله عليه وسلم قَالَ نَضَّرَ اللَّهُ امْرَأً سَمِعَ مَقَالَتِي فَوَعَاهَا وَحَفِظَهَا وَبَلَّغَهَا فَرُبَّ حَامِلِ فِقْهٍ إِلَى مَنْ هُوَ أَفْقَهُ مِنْهُ . ثَلاَثٌ لاَ يُغَلُّ عَلَيْهِنَّ قَلْبُ مُسْلِمٍ إِخْلاَصُ الْعَمَلِ لِلَّهِ وَمُنَاصَحَةُ أَئِمَّةِ الْمُسْلِمِينَ وَلُزُومِ جَمَاعَتِهِمْ فَإِنَّ الدَّعْوَةَ تُحِيطُ مِنْ وَرَائِهِمْ .
Tirmizi
Chapters on Knowledge • Hadith 2765