'Abd al Rahman b. Abzi commanded me that I should ask Ibn 'Abbas about these two verses:" He who slays a believer intentionally his requital shall be Hell where he would abide for ever" (iv. 92). So, I asked him and he said: Nothing has abrogated it. And as for this verse:" And they who call not upon another god with Allah and slay not the soul which Allah has forbidden, except in the cause of justice" (xxv. 68), he (Ibn Abbas) said: This has been revealed in regard to the polytheists." (Using translation from Muslim 3023c)
عَنْ هَاتَيْنِ الْآيَتَيْنِ {وَمَنْ يَقْتُلْ مُؤْمِنًا مُتَعَمِّدًا فَجَزَاؤُهُ جَهَنَّمُ} [النساء 93] فَقَالَ لَمْ يَنْسَخْهَا شَيْءٌ وَعَنْ هَذِهِ الْآيَةِ {وَالَّذِينَ لَا يَدْعُونَ مَعَ اللهِ إِلَهًا آخَرَ وَلَا يَقْتُلُونَ النَّفْسَ الَّتِي حَرَّمَ اللهُ إِلَّا بِالْحَقِّ} [الفرقان 68] قَالَ نَزَلَتْ فِي أَهْلِ الشِّرْكِ