Narrated Said bin Jubair:
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."
Sahih al-Bukhari, Vol. 6, Book of Prophetic Commentary on the Qur'an, Hadith 114
Sahih al-Bukhari, Book of Prophetic Commentary on the Qur'an, Hadith 114