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”"
SahihSahihSahih - Agreed UponBook 37 · Hadith 35