[Machine] The Prophet ﷺ said, "May Allah protect you, O Ka'ab bin Ujrah, from the leadership of fools." He asked, "What is the leadership of fools?" The Prophet ﷺ answered, "Leaders who will come after me and will not follow my guidance or adhere to my Sunnah. Whoever believes in their lies and helps them in their wrongdoing, they are not from me, and I am not from them. They will not enter my pool (in Paradise). But those who do not believe in their lies and do not support them in their wrongdoing, they are from me and I am from them. They will come to my pool. O Ka'ab bin Ujrah, the flesh that grows from unlawful sources will not enter Paradise. The fasting is a shield and charity extinguishes sins, and prayer is evidence (of one's faith). It is narrated that the Prophet ﷺ said, 'The flesh that grows from unlawful sources' and this was reported by Abu Bakr and Umar." This is summarized from the narration of Al-Dhahabi.  

أَنَّ النَّبِيَّ ﷺ قَالَ «أَعَاذَكَ اللَّهُ يَا كَعْبَ بْنَ عُجْرَةَ مِنْ إِمَارَةِ السُّفَهَاءِ» قَالَ وَمَا إِمَارَةُ السُّفَهَاءِ؟ قَالَ أُمَرَاءُ يَكُونُونَ بَعْدِي لَا يَقْتَدُونَ بِهُدَايَ وَلَا يَسْتَنُّونَ بِسُنَّتِي فَمَنْ صَدَّقَهُمْ بِكَذِبِهِمْ وَأَعَانَهُمْ عَلَى ظُلْمِهِمْ فَأُولَئِكَ لَيْسُوا مِنِّي وَلَسْتُ مِنْهُمْ وَلَا يَرِدُونَ عَلَى حَوْضِي وَمَنْ لَمْ يُصَدِّقْهُمْ عَلَى كَذِبِهِمْ وَلَمْ يُعِنْهُمْ عَلَى ظُلْمِهِمْ فَأُولَئِكَ مِنِّي وَأَنَا مِنْهُمْ وَسَيَرِدُونَ عَلَى حَوْضِي يَا كَعْبَ بْنَ عُجْرَةَ إِنَّهُ لَا يَدْخُلُ الْجَنَّةَ لَحْمٌ نَبَتَ مِنْ سُحْتٍ النَّارُ أَوْلَى بِهِ يَا كَعْبَ بْنَ عُجْرَةَ الصَّوْمُ جُنَّةٌ وَالصَّدَقَةُ تُطْفِئُ الْخَطِيئَةَ وَالصَّلَاةُ قُرْبَانٌ أَوْ قَالَ بُرْهَانٌ وَقَدْ رُوِيَ قَوْلُهُ ﷺ لَحْمٌ نَبَتَ مِنْ سُحْتٍ عَنْ أَبِي بَكْرٍ وَعُمَرَ عنه الذهبي في التلخيص