Sahih al-Bukhari 3765
صحيح البخاري#3765Sahihحَدَّثَنَا ابْنُ أَبِي مَرْيَمَ، حَدَّثَنَا نَافِعُ بْنُ عُمَرَ، حَدَّثَنِي ابْنُ أَبِي مُلَيْكَةَ، قِيلَ لاِبْنِ عَبَّاسٍ هَلْ لَكَ فِي أَمِيرِ الْمُؤْمِنِينَ مُعَاوِيَةَ، فَإِنَّهُ مَا أَوْتَرَ إِلاَّ بِوَاحِدَةٍ. قَالَ إِنَّهُ فَقِيهٌ.
Narrated Ibn Abi Mulaika:Somebody said to Ibn `Abbas, "Can you speak to the chief of the believers Mu`awiyah, as he does not pray except one rak`a as witr?" Ibn `Abbas replied, "He is a Faqih (i.e. a learned man who can give religious verdicts)
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: 62:110