Sahih Muslim
The Book of Commentary (Kitab Al-Tafsir)
Book Number: 041 / Hadith Number: 7169
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.