Why don't you visit 'Uthman and talk to him? Thereupon he said: Do you think that I have not talked to him but that I have made you hear? By Allah. I have talked to him (about things) concerning me and him and I did not like to divulge those things about which I had to take the initiative and I do not say to my ruler: "You are the best among people," after I heard Messenger of Allah ﷺ as saying: A man will be brought on the Day of Resurrection and thrown in Hell-Fire and his intestines will pour forth in Hell and he will go round along with them, as an ass goes round the mill stone. The denizens of Hell would gather round him and say: O, so and so, what has happened to you? Were you not enjoining us to do what was reputable and forbid us to do what was disreputable? He will say: Of course, it is so; I used to enjoin (upon people) to do what was reputable but did not practise that myself. I had been forbidding people to do what was disreputable, but practised it myself. (Using translation from Muslim 2989a)   

أَنْ لَا أُكَلِّمَهُ إِلَّا سَمْعَكُمْ إِنِّي لَأُكَلِّمُهُ فِيمَا بَيْنِي وَبَيْنَهُ مَا دُونَ أَنْ أَفْتَتِحَ أَمْرًا لَا أُحِبُّ أَنْ أَكُونَ أَوَّلَ مَنْ افْتَتَحَهُ وَاللهِ لَا أَقُولُ لِرَجُلٍ إِنَّكَ خَيْرُ النَّاسِ وَإِنْ كَانَ أَمِيرًا بَعْدَ إِذْ سَمِعْتُ رَسُولَ اللهِ ﷺ يَقُولُ قَالُوا وَمَا سَمِعْتَهُ يَقُولُ؟ قَالَ سَمِعْتُهُ يَقُولُ يُجَاءُ بِالرَّجُلِ يَوْمَ الْقِيَامَةِ فَيُلْقَى فِي النَّارِ فَتَنْدَلِقُ بِهِ أَقْتَابُهُ فَيَدُورُ بِهَا فِي النَّارِ كَمَا يَدُورُ الْحِمَارُ بِرَحَاهُ فَيُطِيفُ بِهِ أَهْلُ النَّارِ فَيَقُولُونَ يَا فُلَانُ مَا لَكَ؟ مَا أَصَابَكَ؟ أَلَمْ تَكُنْ تَأْمُرُنَا بِالْمَعْرُوفِ وَتَنْهَانَا عَنِ الْمُنْكَرِ؟ فَقَالَ كُنْتُ آمُرُكُمْ بِالْمَعْرُوفِ وَلَا آتِيهِ وَأَنْهَاكُمْ عَنِ الْمُنْكَرِ وَآتِيهِ  

[Machine] I heard the Messenger of Allah ﷺ say: "A man will be brought and thrown into the Fire, then his intestines will be crushed in it, like the crushing of a donkey's intestines with its saddle bags. The people of the Fire will go around him and say, 'O so-and-so, were you not commanding to do good and forbidding evil?' He will say, 'Indeed, I used to command to do good, but I did not do it, and I used to forbid evil, but I did it.' Shu`bah narrated to us, and Mansur narrated to me from Abu Wail, from Usamah bin Nahh that it was similar to this narration, except that he added: 'Then his belly will burst open.'"  

سَمِعْتُ رَسُولَ اللهِ ﷺ يَقُولُ يُجَاءُ بِرَجُلٍ فَيُطْرَحُ فِي النَّارِ فَيَطْحَنُ فِيهَا كَطَحْنِ الْحِمَارِ بِرَحَاهُ فَيُطِيفُ بِهِ أَهْلُ النَّارِ فَيَقُولُونَ يَا فُلَانُ أَلَسْتَ كُنْتَ تَأْمُرُ بِالْمَعْرُوفِ وَتَنْهَى عَنِ الْمُنْكَرِ؟ فَيَقُولُ إِنِّي كُنْتُ آمُرُ بِالْمَعْرُوفِ وَلَا أَفْعَلُهُ وَأَنْهَى عَنِ الْمُنْكَرِ وَأَفْعَلُهُ قَالَ شُعْبَةُ وَحَدَّثَنِي مَنْصُورٌ عَنْ أَبِي وَائِلٍ عَنْ أُسَامَةَ بِنَحْوٍ مِنْهُ إِلَّا أَنَّهُ زَادَ فِيهِ فَتَنْدَلِقُ أَقْتَابُ بَطْنِهِ