"When a person is put in his grave and his companions leave him, he hears the sound of their sandals. Two angels come to him, making him sit up, and say to him: 'What did you say about this man (Muhammad)?' As for the believer, he says: 'I bear witness that he says: 'I bear witness that he is the slave of Allah and His Messenger.' It is said to him: 'Look at your place in hell; Allah has replaced it for you with a place better than it.''' The Messenger of Allah said: "Then he sees them both." As for the disbeliever or the hypocrite, it is said to him: 'What did you say about this man?' He says: 'I do not know; I used to say what the people said.' It is said to him: 'You did not understand and you did not follow those who had understanding.' Then he is dealt a blow between his ears and the man utters a scream which everything near him hears, except for the two races.''' (Using translation from Nasāʾī 2051)   

أَنَّ نَبِيَّ اللهِ ﷺ قَالَ إِنَّ الْعَبْدَ إِذَا وُضِعَ فِي قَبْرِهِ وَتَوَلَّى عَنْهُ أَصْحَابُهُ حَتَّى إِنَّهُ لَيَسْمَعُ قَرْعَ نِعَالِهِمْ أَتَاهُ مَلَكَانِ فَيُقْعِدَانِهِ فَيَقُولَانِ لَهُ مَا كُنْتَ تَقُولُ فِي هَذَا الرَّجُلِ لِمُحَمَّدٍ ﷺ فَأَمَّا الْمُؤْمِنُ فَيَقُولُ أَشْهَدُ أَنَّهُ عَبْدُ اللهِ وَرَسُولُهُ فَيُقَالُ انْظُرْ إِلَى مَقْعَدِكَ مِنَ النَّارِ فَقَدْ أَبْدَلَكَ اللهُ بِهِ مَقْعَدًا فِي الْجَنَّةِ قَالَ رَسُولُ اللهِ ﷺ فَيَرَاهُمَا جَمِيعًا قَالَ رَوْحٌ فِي حَدِيثِهِ قَالَ قَتَادَةُ فَذَكَرَ لَنَا أَنَّهُ يُفْسَحُ لَهُ فِيقَبْرِهِ سَبْعُونَ ذِرَاعًا وَيُمْلَأُ عَلَيْهِ خُضْرًا إِلَى يَوْمِ يُبْعَثُونَ ثُمَّ رَجَعَ إِلَى حَدِيثِ أَنَسِ بْنِ مَالِكٍ قَالَ وَأَمَّا الْكَافِرُ وَالْمُنَافِقُ فَيُقَالُ لَهُ مَا كُنْتَ تَقُولُ فِي هَذَا الرَّجُلِ؟ فَيَقُولُ لَا أَدْرِي كُنْتُ أَقُولُ مَا يَقُولُ النَّاسُ فَيُقَالُ لَهُ لَا دَرَيْتَ وَلَا تَلَيْتَ ثُمَّ يُضْرَبُ بِمِطْرَاقٍ مِنْ حَدِيدٍ ضَرْبَةً بَيْنَ أُذُنَيْهِ فَيَصِيحُ صَيْحَةً فَيَسْمَعُهَا مَنْ يَلِيهِ غَيْرُ الثَّقَلَيْنِ وَقَالَ بَعْضُهُمْ يَضِيقُ عَلَيْهِ قَبْرُهُ حَتَّى تَخْتَلِفَ أَضْلَاعُهُ  

The Messenger of Allah said: "When the deceased - or he said when one of you - is buried, two angels, black and blue (eyed_ come to him. One of them is called Al-Munkar, and the other An-Nakir. They say: 'What did you used to say about this man?' So he says what he was saying (before death) 'He is Allah's slave and His Messenger. I testify that none has the right to be worshipped but Allah and that Muhammad is His slave and His Messenger.' So they say: 'We knew that you would say this.' Then his grave is expanded to seventy by seventy cubits, then it is illuminated for him. Then it is said to him: 'Sleep.' So he said: 'Can I return to my family to inform them?' They say: 'Sleep as a newlywed, whom none awakens but the dearest of his family.' Until Allah resurrects him from his resting place.""If he was a hypocrite he would say: 'I heard people saying something, so I said the same; I do not know.' So they said: 'We knew you would say that.' So the earth is told: 'Constrict him.' So it constricts around him, squeezing his ribs together. He continues being punished like that until Allah resurrects him from his resting place." (Using translation from Tirmidhī 1071)   

قَالَ رَسُولُ اللَّهِ ﷺ «إِذَا قُبِرَ أَحَدُكُمْ أَوِ الْإِنْسَانُ أَتَاهُ مَلَكَانِ أَسْوَدَانِ أَزْرَقَانِ يُقَالُ لِأَحَدِهِمَا الْمُنْكَرُ وَالْآخَرُ النَّكِيرُ فَيَقُولَانِ لَهُ مَا كُنْتَ تَقُولُ فِي هَذَا الرَّجُلِ مُحَمَّدٍ؟ فَهُوَ قَائِلٌ مَا كَانَ يَقُولُ فَإِنْ كَانَ مُؤْمِنًا قَالَ هُوَ عَبْدُ اللَّهِ وَرَسُولُهُ أَشْهَدُ أَنْ لَا إِلَهَ إِلَّا اللَّهُ وَأَنَّ مُحَمَّدًا عَبْدُهُ وَرَسُولُهُ فَيَقُولَانِ لَهُ إِنْ كُنَّا لِنَعْلَمُ إِنَّكَ لَتَقُولُ ذَلِكَ ثُمَّ يَفْسَحُ لَهُ فِي قَبْرِهِ سَبْعُونَ ذِرَاعًا فِي سَبْعِينَ ذِرَاعًا وَيُنَوَّرُ لَهُ فِيهِ فَيُقَالُ لَهُ نَمْ فَيَنَامُ كَنَوْمَةِ الْعَرُوسِ الَّذِي لَا يُوقِظُهُ إِلَّا أَحَبُّ أَهْلِهِ إِلَيْهِ حَتَّى يَبْعَثَهُ اللَّهُ مِنْ مَضْجَعِهِ ذَلِكَ وَإِنْ كَانَ مُنَافِقًا قَالَ لَا أَدْرِي كُنْتُ أَسْمَعُ النَّاسَ يَقُولُونَ شَيْئًا فَكُنْتُ أَقُولُهُ فَيَقُولَانِ لَهُ إِنْ كُنَّا لَنَعْلَمُ أَنَّكَ تَقُولُ ذَلِكَ ثُمَّ يُقَالُ لِلْأَرْضِ الْتَئِمِي عَلَيْهِ فَتَلْتَئِمُ عَلَيْهِ حَتَّى تَخْتَلِفَ فِيهَا أَضْلَاعُهُ فَلَا يَزَالُ مُعَذَّبًا حَتَّى يَبْعَثَهُ اللَّهُ مِنْ مَضْجَعِهِ ذَلِكَ»  

The Messenger of Allah said: "When the deceased - or he said when one of you - is buried, two angels, black and blue (eyed_ come to him. One of them is called Al-Munkar, and the other An-Nakir. They say: 'What did you used to say about this man?' So he says what he was saying (before death) 'He is Allah's slave and His Messenger. I testify that none has the right to be worshipped but Allah and that Muhammad is His slave and His Messenger.' So they say: 'We knew that you would say this.' Then his grave is expanded to seventy by seventy cubits, then it is illuminated for him. Then it is said to him: 'Sleep.' So he said: 'Can I return to my family to inform them?' They say: 'Sleep as a newlywed, whom none awakens but the dearest of his family.' Until Allah resurrects him from his resting place.""If he was a hypocrite he would say: 'I heard people saying something, so I said the same; I do not know.' So they said: 'We knew you would say that.' So the earth is told: 'Constrict him.' So it constricts around him, squeezing his ribs together. He continues being punished like that until Allah resurrects him from his resting place." (Using translation from Tirmidhī 1071)   

"إذا قُبِرَ الميِّتُ أتاهُ ملكانِ أسْودَانِ أزْرقانِ يقالُ لأحَدِهما: المنكَرُ ولِلآخر: النكيرُ فيقولانِ: ما كُنتَ تقولُ في هذا الرّجل؟ فيقول -ما كان يقول-: هو عبد الله ورسولُهُ أشهدُ أن لا إله إلا الله وإنَّ محمدًا عبْدُه ورسولُه فيقُولان: قد كُنَّا نْعلَمُ أنَّكَ تَقُول، ثُمَّ يُفسَحُ له في قبره سبعونَ ذرَاعًا في سبعينَ، ثُمَّ يُنَوَّرُ له فِيه، ثمَّ يقالُ: نَمْ كَنَوْمَة العروس الَّذِي لا يوقظه إلَّا أحبُّ أهله إليهِ حتَّى يبْعَثَه الله من مضجعه ذلك، وإن كان منافقًا قال: قد سمعت النَّاسَ يقولون فقلتُ مِثْلَهُ، لا أدْرِي فيقولان: قد كنَّا نَعْلَم أنَّكَ تقُول ذَلِك، فيقالُ للأَرْضِ: التِئمِي عليه فتلتَئَمُ عليه فتختَلِفُ أضلاعُه، فلا يزَالُ فيها معذبًا حتَّى يبْعثَه الله من مضجعهِ ذلك".