يَحْيَى بْنُ أَبِي الْمُطَاعِ، عَنِ الْعِرْبَاضِ بْنِ سَارِيَةَ
[Machine] The Messenger of Allah, ﷺ , came to us one morning and delivered a sermon that caused our hearts to tremble and our eyes to shed tears. So we said, "O Messenger of Allah, you have advised us with a farewell sermon. Please give us some final instructions." He said, "I advise you to have Taqwa (God-consciousness), and to listen and obey, even if an Ethiopian slave were to rule over you. You will see much disagreement and discord after me, so hold fast to my Sunnah (way) and the Sunnah of the Rightly Guided Caliphs. Bite onto it with your molar teeth. And beware of newly invented matters (in religion), for every newly invented matter is an innovation and every innovation is misguidance."
قَامَ فِينَا رَسُولُ اللهِ ﷺ ذَاتَ غَدَاةٍ فَوَعَظَنَا مَوْعِظَةً وَجِلَتْ مِنْهَا الْقُلُوبُ وَذَرَفَتْ مِنْهُ الْعُيُونُ فَقُلْنَا يَا رَسُولَ اللهِ إِنَّكَ وَعَظْتَنَا مَوْعِظَةَ مُوَدِّعٍ فَاعْهَدْ إِلَيْنَا فَقَالَ «عَلَيْكُمْ بِتَقْوَى اللهِ وَالسَّمْعِ وَالطَّاعَةِ وَإِنْ كَانَ عَبْدًا حَبَشِيًّا فَسَيَرَى مَنْ بَقِيَ بَعْدِي اخْتِلَافًا شَدِيدًا فَعَلَيْكُمْ بِسُنَّتِي وَسُنَّةِ الْخُلَفَاءِ الرَّاشِدِينَ وَعَضُّوا عَلَيْهَا بِالنَّوَاجِذِ وَإِيَّاكُمْ وَالْمُحْدَثَاتِ فَإِنَّ كُلَّ مُحْدَثَةٍ ضَلَالَةٌ»