ENOfficial
It was narrated that Sa'eed bin Jubair said: "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.'"
Source: sunnah.com
Other translations
Arabic
قَالَ وَأَخْبَرَنِي أَزْهَرُ بْنُ جَمِيلٍ الْبَصْرِيُّ، قَالَ حَدَّثَنَا خَالِدُ بْنُ الْحَارِثِ، قَالَ حَدَّثَنَا شُعْبَةُ، عَنِ الْمُغِيرَةِ بْنِ النُّعْمَانِ، عَنْ سَعِيدِ بْنِ جُبَيْرٍ، قَالَ اخْتَلَفَ أَهْلُ الْكُوفَةِ فِي هَذِهِ الآيَةِ { وَمَنْ يَقْتُلْ مُؤْمِنًا مُتَعَمِّدًا } فَرَحَلْتُ إِلَى ابْنِ عَبَّاسٍ فَسَأَلْتُهُ فَقَالَ لَقَدْ أُنْزِلَتْ فِي آخِرِ مَا أُنْزِلَ ثُمَّ مَا نَسَخَهَا شَىْءٌ .
sunnah.com