"Abdur-Rahman bin Abi Laila told me to ask Ibn 'Abbas about two Verses: 'And whoever kills a believe4r intentionally, his recompense is Hell' I asked him and he said: 'Nothing of this has been abrogated.'(And I asked him about the Verse): 'And those who invoke not any other ilah (god) along with Allah, nor kill such person as Allah has forbidden, except by right. He said: 'This was revealed concerning the people of shirk.  

عَنْ هَاتَيْنِ الآيَتَيْنِ { وَمَنْ يَقْتُلْ مُؤْمِنًا مُتَعَمِّدًا فَجَزَاؤُهُ جَهَنَّمُ } فَسَأَلْتُهُ فَقَالَ لَمْ يَنْسَخْهَا شَىْءٌ وَعَنْ هَذِهِ الآيَةِ { وَالَّذِينَ لاَ يَدْعُونَ مَعَ اللَّهِ إِلَهًا آخَرَ وَلاَ يَقْتُلُونَ النَّفْسَ الَّتِي حَرَّمَ اللَّهُ إِلاَّ بِالْحَقِّ } قَالَ نَزَلَتْ فِي أَهْلِ الشِّرْكِ  

"The people of Al-Kufah differed concerning this verse: 'And whoever kills a believer intentionally. So I went to Ibn 'Abbas and asked him, and he said: 'It was revealed among the last of what was revealed, and nothing of it was abrogated after that.  

نَزَلَتْ فِي آخِرِ مَا أُنْزِلَتْ وَمَا نَسَخَهَا شَىْءٌ  

"I said to Ibn Abbas . 'Can a person who killed a believer intentionally repent?' He said: 'No.' Irecited the Verse from Al-Furqan to him: And those who invoke not any other ilah (god) along with Allah, nor kill such person a Allah has forbidden, except but right. He said: 'This Verse was revealed in Makkah and was abrogated by a verse that was revealed in Al-Madinah: And whoever kills a believer intentionally, his recompense is Hell  

قُلْتُ لاِبْنِ عَبَّاسٍ هَلْ لِمَنْ قَتَلَ مُؤْمِنًا مُتَعَمِّدًا مِنْ تَوْبَةٍ قَالَ لاَ وَقَرَأْتُ عَلَيْهِ الآيَةَ الَّتِي فِي الْفُرْقَانِ { وَالَّذِينَ لاَ يَدْعُونَ مَعَ اللَّهِ إِلَهًا آخَرَ وَلاَ يَقْتُلُونَ النَّفْسَ الَّتِي حَرَّمَ اللَّهُ إِلاَّ بِالْحَقِّ } قَالَ هَذِهِ آيَةٌ مَكِّيَّةٌ نَسَخَتْهَا آيَةٌ مَدَنِيَّةٌ { وَمَنْ يَقْتُلْ مُؤْمِنًا مُتَعَمِّدًا فَجَزَاؤُهُ جَهَنَّمُ }  

Ibn 'Abbas was asked about someone who killed a believer deliberately then he repented, believed and did righteous deeds, and followed true guidance. Ibn 'Abbas said: "There is no way he could repent! I heard your Prophet say; He (the victim) will come hanging onto his killer with his jugular veins flowing with blood and saying: "Ask him why he killed me." Then he said: "by Allah, Allah revealed it and never abrogated anything of it.  

سَمِعْتُ نَبِيَّكُمْ ﷺ يَقُولُ يَجِيءُ مُتَعَلِّقًا بِالْقَاتِلِ تَشْخَبُ أَوْدَاجُهُ دَمًا يَقُولُ سَلْ هَذَا فِيمَ قَتَلَنِي ثُمَّ قَالَ وَاللَّهِ لَقَدْ أَنْزَلَهَا وَمَا نَسَخَهَا  

"I heard Ana's say: 'The Messenger of Allah said: 'the major sins are; associating others with Allah (shirk), disobeying one's parents, killing a soul (murder) and speaking falsely.  

قَالَ رَسُولُ اللَّهِ ﷺ ح وَأَخْبَرَنَا مُحَمَّدُ بْنُ عَبْدِ الأَعْلَى قَالَ حَدَّثَنَا خَالِدٌ قَالَ حَدَّثَنَا شُعْبَةُ عَنْ عُبَيْدِ اللَّهِ بْنِ أَبِي بَكْرٍ عَنْ أَنَسٍ عَنِ النَّبِيِّ ﷺ قَالَ الْكَبَائِرُ الشِّرْكُ بِاللَّهِ وَعُقُوقُ الْوَالِدَيْنِ وَقَتْلُ النَّفْسِ وَقَوْلُ الزُّورِ  

"The major sins are: associating others with Allah, disobeying parents, killing a souls (murder) and swearing a false oath knowingly.  

عَنِ النَّبِيِّ ﷺ قَالَ الْكَبَائِرُ الإِشْرَاكُ بِاللَّهِ وَعُقُوقُ الْوَالِدَيْنِ وَقَتْلُ النَّفْسِ وَالْيَمِينُ الْغَمُوسُ  

"The Messenger of Allah said: 'No one who commits Zina is a believer at the moment when he is committing Zina, and no one who drinks wine is a believer at the moment when he is drinking it, and no thief is a believer at the moment when he is stealing, and no killer is a believer at the moment he is killing  

قَالَ رَسُولُ اللَّهِ ﷺ لاَ يَزْنِي الْعَبْدُ حِينَ يَزْنِي وَهُوَ مُؤْمِنٌ وَلاَ يَشْرَبُ الْخَمْرَ حِينَ يَشْرَبُهَا وَهُوَ مُؤْمِنٌ وَلاَ يَسْرِقُ وَهُوَ مُؤْمِنٌ وَلاَ يَقْتُلُ وَهُوَ مُؤْمِنٌ