حُذَيْفَةُ بْنُ الْيَمَان يَقُوْلُ كَانَ النَّاسُ يَسْأَلُوْنَ رَسُوْلَ اللّٰهِ صلَّى اللّٰه عَلَيْهِ وَسَلَّمَ عَنِ الْخَيْرِ وَكُنْتُ أَسْأَلُهُ عَنِ الشَّرّمَخَافَةَ أَنْ يُدْرِكَنِيْ فَقُلْتُ يَا رَسُوْلَ اللّٰهِ إِنَّا كُنَّا فِي جَاهِلِيَّةٍ وَشَرٍّ فَجَاءَنَا اللّٰهُ بِهَذَا الْخَيْرِ فَهَلْ بَعْدَ هَذَا الْخَيْرِ مِنْ شَرٍّ قَالَ نَعَمْ قُلْتُ وَهَلْ بَعْدَ ذَلِكَ الشَّرِّ مِنْ خَيْرٍ قَالَ نَعَمْ وَفِيهِ دَخَنٌ قُلْتُ وَمَا دَخَنُهُ قَالَ قَوْمٌ يَهْدُوْنَ بِغَيْرِ هَدْىٍ تَعْرِفُ مِنْهُمْ وَتُنْكِرُ قُلْتُ فَهَلْ بَعْدَ ذَلِكَ الْخَيْرِ مِنْ شَرٍّ قَالَ نَعَمْ دُعَاةٌ عَلَى أَبْوَابِ جَهَنَّمَ مَنْ أَجَابَهُمْ إِلَيْهَا قَذَفُوْهُ فِيْهَا قُلْتُ يَا رَسُوْلَ اللّٰهِ صِفْهُمْ لَنَا قَالَ هُمْ مِنْ جِلْدَتِنَا وَيَتَكَلَّمُوْنَ بِأَلْسِنَتِنَا قُلْتُ فَمَا تَأْمُرُنِيْ إِنْ أَدْرَكَنِيْ ذَلِكَ قَالَ تَلْزَمُ جَمَاعَةَ الْمُسْلِمِيْنَ وَإِمَامَهُمْ قُلْتُ فَإِنْ لَمْ يَكُنْ لَهُمْ جَمَاعَةٌ وَلَا إِمَامٌ قَالَ فَاعْتَزِلْ تِلْكَ الْفِرَقَ كُلَّهَا، وَلَوْ أَنْ تَعَضَّ بِأَصْلِ شَجَرَةٍ، حَتَّى يُدْرِكَكَ الْمَوْتُ وَأَنْتَ عَلَى ذَلِكَ
Hazrat Huzayfa ibn Al-Yaman, may Allah be pleased with him, narrates:
“People used to ask the Prophetsa of Allah about the good, but I used to ask him about the evil lest I should be overtaken by them. So, I said, ‘O Prophet of Allah! We were living in ignorance and in [an extremely] worst atmosphere, then Allah brought to us this good [i.e. Islam]; will there be any evil after this good?’ He said, ‘Yes.’ I said, ‘Will there be any good after that evil?’ He replied, ‘Yes, but it will be tainted [not pure.]’ I asked, ‘What will be its taint?’ He replied, ‘[There will be] some people who will guide others not according to my tradition? You will approve of some of their deeds and disapprove of some others.’ I asked, ‘Will there be any evil after that good?’ He replied, ‘Yes, [there will be] some people calling at the gates of the [Hell] Fire and whoever will respond to their call will be thrown by them into the [Hell] Fire.’ I said, ‘O Prophet of Allah! Will you describe them to us?’ He said, ‘They will be from our own people and will speak our language.’ I said, ‘What do you order me to do if such a state should take place in my life?’ He said, ‘Attach firmly to the jamaat [group] of Muslims and their imam.’ I said, ‘If there is neither a jamaat of Muslims, nor an imam?’ He said, ‘Then turn away from all those sects even if you were to bite [eat] the roots of a tree till death overtakes you while you are in that state.’”
(Sahih al-Bukhari, Kitab al-Fitan, Hadith 7084)