Sahih al-Bukhari 4917
صحيح البخاري#4917Sahihحَدَّثَنَا مَحْمُودٌ، حَدَّثَنَا عُبَيْدُ اللَّهِ، عَنْ إِسْرَائِيلَ، عَنْ أَبِي حَصِينٍ، عَنْ مُجَاهِدٍ، عَنِ ابْنِ عَبَّاسٍ ـ رضى الله عنهما ـ {عُتُلٍّ بَعْدَ ذَلِكَ زَنِيمٍ} قَالَ رَجُلٌ مِنْ قُرَيْشٍ لَهُ زَنَمَةٌ مِثْلُ زَنَمَةِ الشَّاةِ.
Narrated Ibn `Abbas:(regarding the Verse):-- 'Cruel after all that, base-born (of illegitimate birth).' (68.13) It was revealed in connection with a man from Quaraish who had a notable sign (Zanamah) similar to the notable sign which usually-hung on the neck of a sheep (to recognize it)
Scholarly Authentication
The label above is the grade most of these scholars gave — one dissenting opinion no longer speaks for all of them. If any scholar calls a narration fabricated, that verdict is shown instead, whatever the others say. Each scholar's own wording:
Every narration in Sahih al-Bukhari is accepted as Sahih (authentic) by the established status of the book.
In-book reference: 65:437