Sahih al-Bukhari 4590
Sahih al-Bukhari · Book 65: Prophetic Commentary on the Qur'an (Tafseer of the Prophet (pbuh)) · "And whoever kills a believer intentionally, his recompense is Hell..." (V.4:93)
Narrated Sa`id bin Jubair:
حَدَّثَنَا آدَمُ بْنُ أَبِي إِيَاسٍ ، حَدَّثَنَا شُعْبَةُ ، حَدَّثَنَا مُغِيرَةُ بْنُ النُّعْمَانِ ، قَالَ سَمِعْتُ سَعِيدَ بْنَ جُبَيْرٍ ، قَالَ { آيَةٌ} اخْتَلَفَ فِيهَا أَهْلُ الْكُوفَةِ، فَرَحَلْتُ فِيهَا إِلَى ابْنِ عَبَّاسٍ فَسَأَلْتُهُ عَنْهَا فَقَالَ نَزَلَتْ هَذِهِ الآيَةُ {وَمَنْ يَقْتُلْ مُؤْمِنًا مُتَعَمِّدًا فَجَزَاؤُهُ جَهَنَّمُ} هِيَ آخِرُ مَا نَزَلَ وَمَا نَسَخَهَا شَىْءٌ.
The people of Kufa disagreed (disputed) about the above Verse. So I went to Ibn `Abbas and asked him about it. He said, "This Verse:-- "And whoever kills a believer intentionally, his recompense is Hell." was revealed last of all (concerning premeditated murder) and nothing abrogated it."