I said to Ibn Abbas: Will the repentance of that person be accepted who kills a believer intentionally? He said: No. I recited to him this verse of Sura al-Furqan (xix.):" And those who call not upon another god with Allah and slay not the soul which Allah has forbidden except in the cause of justice" to the end of the verse. He said: This is a Meccan verse which has been abrogated by a verse revealed at Medina:" He who slays a believer intentionally, for him is the requital of Hell-Fire where he would abide for ever," and in the narration of Ibn Hisham (the words are): I recited to him this verse of Sura al-Furqan:" Except one who made repentance."  

قُلْتُ لاِبْنِ عَبَّاسٍ أَلِمَنْ قَتَلَ مُؤْمِنًا مُتَعَمِّدًا مِنْ تَوْبَةٍ قَالَ لاَ قَالَ فَتَلَوْتُ عَلَيْهِ هَذِهِ الآيَةَ الَّتِي فِي الْفُرْقَانِ { وَالَّذِينَ لاَ يَدْعُونَ مَعَ اللَّهِ إِلَهًا آخَرَ وَلاَ يَقْتُلُونَ النَّفْسَ الَّتِي حَرَّمَ اللَّهُ إِلاَّ بِالْحَقِّ} إِلَى آخِرِ الآيَةِ قَالَ هَذِهِ آيَةٌ مَكِّيَّةٌ نَسَخَتْهَا آيَةٌ مَدَنِيَّةٌ { وَمَنْ يَقْتُلْ مُؤْمِنًا مُتَعَمِّدًا فَجَزَاؤُهُ جَهَنَّمُ خَالِدًا} وَفِي رِوَايَةِ ابْنِ هَاشِمٍ فَتَلَوْتُ هَذِهِ الآيَةَ الَّتِي فِي الْفُرْقَانِ{ إِلاَّ مَنْ تَابَ}  

"I said to Ibn 'Abbas: 'Can a person, who killed a believer intentionally, repent?' He said: 'No.' I recited the Verse from Al-Furqan to him: 'And those who invoke not any other ilah (god) along with Allah, or kill such person as Allah has forbidden, except by 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 }  

"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 }  

I asked Ibn 'Abbas (about the verse relating to intentional homicide in Surat An-Nisa') He said: When the verse "Those who invoke not with Allah any other god, nor slay such life as Allah had made sacred, except for just cause" was revealed, the polytheists of Mecca said: We have killed the soul prohibited by Allah, invoked another god along with Allah for worship, and committed shameful deeds. So Allah revealed the verse "unless he repents, believes, and works righteous deeds, for Allah will change the evil of such persons into good." This is meant for them. As regards the verse "if a man kills a believer intentionally, his recompense is Hell" He said: If a man knows the command of Islam and intentionally kills a believer, his repentance wil not be accepted. I then mentioned it to Mujahid. He said: "Except the one who is ashamed (of his sin)."  

لَمَّا نَزَلَتِ الَّتِي فِي الْفُرْقَانِ { وَالَّذِينَ لاَ يَدْعُونَ مَعَ اللَّهِ إِلَهًا آخَرَ وَلاَ يَقْتُلُونَ النَّفْسَ الَّتِي حَرَّمَ اللَّهُ إِلاَّ بِالْحَقِّ } قَالَ مُشْرِكُو أَهْلِ مَكَّةَ قَدْ قَتَلْنَا النَّفْسَ الَّتِي حَرَّمَ اللَّهُ وَدَعَوْنَا مَعَ اللَّهِ إِلَهًا آخَرَ وَأَتَيْنَا الْفَوَاحِشَ فَأَنْزَلَ اللَّهُ { إِلاَّ مَنْ تَابَ وَآمَنَ وَعَمِلَ عَمَلاً صَالِحًا فَأُولَئِكَ يُبَدِّلُ اللَّهُ سَيِّئَاتِهِمْ حَسَنَاتٍ } فَهَذِهِ لأُولَئِكَ قَالَ وَأَمَّا الَّتِي فِي النِّسَاءِ { وَمَنْ يَقْتُلْ مُؤْمِنًا مُتَعَمِّدًا فَجَزَاؤُهُ جَهَنَّمُ } الآيَةُ قَالَ الرَّجُلُ إِذَا عَرَفَ شَرَائِعَ الإِسْلاَمِ ثُمَّ قَتَلَ مُؤْمِنًا مُتَعَمِّدًا فَجَزَاؤُهُ جَهَنَّمُ لاَ تَوْبَةَ لَهُ فَذَكَرْتُ هَذَا لِمُجَاهِدٍ فَقَالَ إِلاَّ مَنْ نَدِمَ  

[Machine] This verse, which is in Surah An-Nisa' (Chapter 4) {And whoever kills a believer intentionally, his recompense is Hell to abide therein, and the wrath and the curse of Allah are upon him, and a great punishment is prepared for him}, was revealed after the verses in Surah Al-Furqan (Chapter 25) {And those who do not invoke with Allah another deity or kill the soul which Allah has forbidden [to be killed], except by right, and do not commit unlawful sexual intercourse. And whoever should do that will meet a penalty}. Six months apart.  

نَزَلَتْ هَذِهِ الْآيَةُ الَّتِي فِي سُورَةِ النِّسَاءِ {وَمَنْ يَقْتُلْ مُؤْمِنًا مُتَعَمِّدًا فَجَزَاؤُهُ جَهَنَّمُ خَالِدًا فِيهَا وَغَضِبَ اللهُ عَلَيْهِ وَلعَنْهُ وَأَعَدَّ لَهُ عَذَابًا عَظِيمًا} بَعْدَ الْآيَاتِ الَّتِي فِي سُورَةِ الْفُرْقَانِ {وَالَّذِينَ لَا يَدْعُونَ مَعَ اللهِ إِلَهًا آخَرَ وَلَا يَقْتُلُونَ النَّفْسَ الَّتِي حَرَّمَ اللهُ إِلَّا بِالْحَقِّ وَلَا يَزْنُونَ وَمَنْ يَفْعَلْ ذَلِكَ يَلْقَ أَثَامًا} بِسِتَّةِ أَشْهُرٍ