"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.
Sunan an-Nasa'i Book 45, Hadith 159
← Previous Hadith "Abdur-Rahman bin Abi Laila told me to ask Ibn 'Abbas about two Verses: 'And whoever kills a believe4r intentionally, his recompense is Hell' I asked him and he said: 'Nothing of this has been abrogated.'(And I asked him about the Verse): 'And those who invoke not any other ilah (god) along with Allah, nor kill such person as Allah has forbidden, except by right. He said: 'This was revealed concerning the people of shirk.

Sunan an-Nasa'i Book 45, Hadith 158 Next Hadith → "I said to Ibn Abbas . 'Can a person who killed a believer intentionally repent?' He said: 'No.' Irecited the Verse from Al-Furqan to him: And those who invoke not any other ilah (god) along with Allah, nor kill such person a Allah has forbidden, except but right. He said: 'This Verse was revealed in Makkah and was abrogated by a verse that was revealed in Al-Madinah: And whoever kills a believer intentionally, his recompense is Hell

Sunan an-Nasa'i Book 45, Hadith 160