Sahih Muslim 3023 a
Sa'id b. Jubair reported:
The inhabitants of Kufa differed in regard to this verse:" But whoever slays another believer intentionally, his requital shall be Hell" (iv. 92), so I went to Ibn 'Abbas and asked him about it, whereupon he said: This has been revealed and nothing abrogated it.
حَدَّثَنَا عُبَيْدُ اللَّهِ بْنُ مُعَاذٍ الْعَنْبَرِيُّ، حَدَّثَنَا أَبِي، حَدَّثَنَا شُعْبَةُ، عَنِ الْمُغِيرَةِ بْنِ النُّعْمَانِ، عَنْ سَعِيدِ بْنِ جُبَيْرٍ، قَالَ اخْتَلَفَ أَهْلُ الْكُوفَةِ فِي هَذِهِ الآيَةِ ‏{‏ وَمَنْ يَقْتُلْ مُؤْمِنًا مُتَعَمِّدًا فَجَزَاؤُهُ جَهَنَّمُ‏}‏ فَرَحَلْتُ إِلَى ابْنِ عَبَّاسٍ فَسَأَلْتُهُ عَنْهَا فَقَالَ لَقَدْ أُنْزِلَتْ آخِرَ مَا أُنْزِلَ ثُمَّ مَا نَسَخَهَا شَىْءٌ ‏.‏