A mass murderer can be forgiven on repenting before death

There was a person before you who had killed ninety-nine persons and then made an inquiry about the learned persons of the world (who could show him the way to salvation). He was directed to a monk. He came to him and told him that he had killed ninety-nine persons and asked him whether there was any scope for his repentance to be accepted. He said: No. He killed him also and thus completed one hundred. He then asked about the learned persons of the earth and he was directed to a scholar, and he told him that he had killed one hundred persons and asked him whether there was any scope for his repentance to be accepted. He said: Yes; what stands between you and repentance? You better go to such and such land; there are people devoted to prayer and worship and you also worship along with them and do not come to the land of yours since it was an evil land (for you).

So he went away and he had hardly covered half the distance when death came to him and there was a dispute between the angels of mercy and the angels of punishment. The angels of mercy said: This man has come as a penitent and remorseful to Allah and the angels of punishment said: He has done no good at all. Then there came another angel in the form of a human being in order to decide between them. He said: You measure the land to which he has drawn near. They measured it and found him nearer to the land where he intended to go (the land of piety), and so the angels of mercy took possession of it. Qatada said that Hasan told him that it was said to them that as death approached him, he crawled upon his chest (and managed) to slip in the land of mercy.  

أَنَّ نَبِيَّ اللَّهِ ﷺ قَالَ: «كَانَ فِيمَنْ كَانَ قَبْلَكُمْ رَجُلٌ قَتَلَ تِسْعَةً وَتِسْعِينَ نَفْسًا۔ فَسَأَلَ عَنْ أَعْلَمِ أَهْلِ الأَرْضِ، فَدُلَّ عَلَى رَاهِبٍ۔ فَأَتَاهُ فَقَالَ إِنَّهُ قَتَلَ تِسْعَةً وَتِسْعِينَ نَفْسًا فَهَلْ لَهُ مِنَ تَوْبَةٍ۔ فَقَالَ لاَ، فَقَتَلَهُ فَكَمَّلَ بِهِ مِائَةً۔ ثُمَّ سَأَلَ عَنْ أَعْلَمِ أَهْلِ الأَرْضِ، فَدُلَّ عَلَى رَجُلٍ عَالِمٍ۔ فَقَالَ إِنَّهُ قَتَلَ مِائَةَ نَفْسٍ فَهَلْ لَهُ مِنْ تَوْبَةٍ۔ فَقَالَ نَعَمْ وَمَنْ يَحُولُ بَيْنَهُ وَبَيْنَ التَّوْبَةِ؟ انْطَلِقْ إِلَى أَرْضِ كَذَا وَكَذَا فَإِنَّ بِهَا أُنَاسًا يَعْبُدُونَ اللَّهَ، فَاعْبُدِ اللَّهَ مَعَهُمْ وَلاَ تَرْجِعْ إِلَى أَرْضِكَ فَإِنَّهَا أَرْضُ سَوْءٍ۔

فَانْطَلَقَ حَتَّى إِذَا نَصَفَ الطَّرِيقَ أَتَاهُ الْمَوْتُ، فَاخْتَصَمَتْ فِيهِ مَلاَئِكَةُ الرَّحْمَةِ وَمَلاَئِكَةُ الْعَذَابِ۔ فَقَالَتْ مَلاَئِكَةُ الرَّحْمَةِ: جَاءَ تَائِبًا مُقْبِلاً بِقَلْبِهِ إِلَى اللَّهِ۔ وَقَالَتْ مَلاَئِكَةُ الْعَذَابِ: إِنَّهُ لَمْ يَعْمَلْ خَيْرًا قَطُّ۔ فَأَتَاهُمْ مَلَكٌ فِي صُورَةِ آدَمِيٍّ فَجَعَلُوهُ بَيْنَهُمْ۔ فَقَالَ: قِيسُوا مَا بَيْنَ الأَرْضَيْنِ فَإِلَى أَيَّتِهِمَا كَانَ أَدْنَى فَهُوَ لَهُ۔ فَقَاسُوهُ فَوَجَدُوهُ أَدْنَى إِلَى الأَرْضِ الَّتِي أَرَادَ، فَقَبَضَتْهُ مَلاَئِكَةُ الرَّحْمَةِ۔

قَالَ قَتَادَةُ فَقَالَ الْحَسَنُ ذُكِرَ لَنَا أَنَّهُ لَمَّا أَتَاهُ الْمَوْتُ نَأَى بِصَدْرِهِ  

There is no chance for repentance for you. He killed the monk also and then began to make an inquiry and moved from one village to another village where there lived pious persons, and as he had covered some distance, he was overtaken by death, but he managed to crawl upon his chest (to the side nearer to the place where the pious men lived). He died and then there was a dispute between the angels of mercy and the angels of punishment and (when it was measured) he was found to be nearer to the village where pious persons were living equal to the Space of a span and he was thus included among them.  

عَنِ النَّبِيِّ ﷺ أَنَّ رَجُلاً قَتَلَ تِسْعَةً وَتِسْعِينَ نَفْسًا فَجَعَلَ يَسْأَلُ هَلْ لَهُ مِنْ تَوْبَةٍ فَأَتَى رَاهِبًا فَسَأَلَهُ فَقَالَ لَيْسَتْ لَكَ تَوْبَةٌ فَقَتَلَ الرَّاهِبَ ثُمَّ جَعَلَ يَسْأَلُ ثُمَّ خَرَجَ مِنْ قَرْيَةٍ إِلَى قَرْيَةٍ فِيهَا قَوْمٌ صَالِحُونَ فَلَمَّا كَانَ فِي بَعْضِ الطَّرِيقِ أَدْرَكَهُ الْمَوْتُ فَنَأَى بِصَدْرِهِ ثُمَّ مَاتَ فَاخْتَصَمَتْ فِيهِ مَلاَئِكَةُ الرَّحْمَةِ وَمَلاَئِكَةُ الْعَذَابِ فَكَانَ إِلَى الْقَرْيَةِ الصَّالِحَةِ أَقْرَبَ مِنْهَا بِشِبْرٍ فَجُعِلَ مِنْ أَهْلِهَا  

" Allah commanded the earth (from where) he wanted to come out to move itself away and to the other earth (where he wanted to go) to draw nearer."  

أَنْ تَقَرَّبِي  

When it will be the Day of Resurrection Allah would deliver to every Muslim a Jew or a Christian and say: That is your rescue from Hell-Fire.  

قَالَ رَسُولُ اللَّهِ ﷺ إِذَا كَانَ يَوْمُ الْقِيَامَةِ دَفَعَ اللَّهُ ﷻ إِلَى كُلِّ مُسْلِمٍ يَهُودِيًّا أَوْ نَصْرَانِيًّا فَيَقُولُ هَذَا فَكَاكُكَ مِنَ النَّارِ  

No Muslim would die but Allah would admit in his stead a Jew or a Christian in Hell-Fire. 'Umar b. Abd al-'Aziz took an oath: By One besides Whom there is no god but He, thrice that his father had narrated that to him from Messenger of Allah ﷺ.  

عَنِ النَّبِيِّ ﷺ قَالَ لاَ يَمُوتُ رَجُلٌ مُسْلِمٌ إِلاَّ أَدْخَلَ اللَّهُ مَكَانَهُ النَّارَ يَهُودِيًّا أَوْ نَصْرَانِيًّا قَالَ فَاسْتَحْلَفَهُ عُمَرُ بْنُ عَبْدِ الْعَزِيزِ بِاللَّهِ الَّذِي لاَ إِلَهَ إِلاَّ هُوَ ثَلاَثَ مَرَّاتٍ أَنَّ أَبَاهُ حَدَّثَهُ عَنْ رَسُولِ اللَّهِ ﷺ قَالَ فَحَلَفَ لَهُ قَالَ فَلَمْ يُحَدِّثْنِي سَعِيدٌ أَنَّهُ اسْتَحْلَفَهُ وَلَمْ يُنْكِرْ عَلَى عَوْنٍ قَوْلَهُ  

This hadith has been transmitted on the authority of 'Aun b. Utba.  

حَدَّثَنَا قَتَادَةُ بِهَذَا الإِسْنَادِ نَحْوَ حَدِيثِ عَفَّانَ وَقَالَ عَوْنُ بْنُ عُتْبَةَ  

There would come people amongst the Muslims on the Day of Resurrection with as heavy sins as a mountain, and Allah would forgive them and He would place in their stead the Jews and the Christians. (As far as I think), Abu Raub said: I do not know as to who is in doubt. Abu Burda said: I narrated it to 'Umar b. 'Abd al-'Aziz, whereupon he said: Was it your father who narrated it to you from Allah's Apostle ﷺ? I said: Yes.  

عَنِ النَّبِيِّ ﷺ قَالَ يَجِيءُ يَوْمَ الْقِيَامَةِ نَاسٌ مِنَ الْمُسْلِمِينَ بِذُنُوبٍ أَمْثَالِ الْجِبَالِ فَيَغْفِرُهَا اللَّهُ لَهُمْ وَيَضَعُهَا عَلَى الْيَهُودِ وَالنَّصَارَى فِيمَا أَحْسِبُ أَنَا قَالَ أَبُو رَوْحٍ لاَ أَدْرِي مِمَّنِ الشَّكُّ قَالَ أَبُو بُرْدَةَ فَحَدَّثْتُ بِهِ عُمَرَ بْنَ عَبْدِ الْعَزِيزِ فَقَالَ أَبُوكَ حَدَّثَكَ هَذَا عَنِ النَّبِيِّ ﷺ قُلْتُ نَعَمْ  

How did you hear Messenger of Allah ﷺ as saying something about intimate conversation? He said: I heard him say: A believer will be brought to his Lord, the Exalted and Glorious, on the Day of Resurrection and He would place upon him His veil (of Light) and make him confess his faults and say: Do you recognise (your faults)? He would say: My Lord, I do recognise (them). He (the Lord) would say: I concealed them for you in the world. And today I forgive them. And he would then be given the Book containing (the account of his) good deeds. And so far as the non-believers and hypocrites are concerned, there would be general announcement about them before all creation telling them that these (people, i. e. non-believers and hypocrites) told a lie about Allah.  

سَمِعْتَ رَسُولَ اللَّهِ ﷺ يَقُولُ فِي النَّجْوَى قَالَ سَمِعْتُهُ يَقُولُ يُدْنَى الْمُؤْمِنُ يَوْمَ الْقِيَامَةِ مِنْ رَبِّهِ ﷻ حَتَّى يَضَعَ عَلَيْهِ كَنَفَهُ فَيُقَرِّرُهُ بِذُنُوبِهِ فَيَقُولُ هَلْ تَعْرِفُ فَيَقُولُ أَىْ رَبِّ أَعْرِفُ قَالَ فَإِنِّي قَدْ سَتَرْتُهَا عَلَيْكَ فِي الدُّنْيَا وَإِنِّي أَغْفِرُهَا لَكَ الْيَوْمَ فَيُعْطَى صَحِيفَةَ حَسَنَاتِهِ وَأَمَّا الْكُفَّارُ وَالْمُنَافِقُونَ فَيُنَادَى بِهِمْ عَلَى رُءُوسِ الْخَلاَئِقِ هَؤُلاَءِ الَّذِينَ كَذَبُوا عَلَى اللَّهِ