Al-Mughirah bin al-Nu'man said: I heard Sa'id bin Jubayr (may Allah have mercy on him) say: The people of Kufah differed over this verse: 'And whoever kills a believer intentionally, his recompense is Hell, abiding therein forever' [Surah al-Nisa: 93]. I went to Ibn Abbas (may Allah be pleased with him) and asked him about it, and he said: This verse, 'his recompense is Hell', was among the last to be revealed, and nothing abrogated it.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب النفقات / 15825