Chapter 57: The Book of Commentary on the Qur'an
Sa' id b. Jubair reported: The inhabitants of Kufa differed in regard to this verse: " But whoever slays another believer intentionally, his requital shall be Hell" (iv. 92), so I went to Ibn 'Abbas and asked him about it, whereupon he said: This has been revealed and nothing abrogated it.
Sahih Muslim 3023a