It was narrated that Sa'eed bin Jabair 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””"
SahihSahihHasanBook 45 · Hadith 159