Sahih al-Bukhari 5893
صحيح البخاري#5893Sahihحَدَّثَنِي مُحَمَّدٌ، أَخْبَرَنَا عَبْدَةُ، أَخْبَرَنَا عُبَيْدُ اللَّهِ بْنُ عُمَرَ، عَنْ نَافِعٍ، عَنِ ابْنِ عُمَرَ ـ رضى الله عنهما ـ قَالَ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم " انْهَكُوا الشَّوَارِبَ، وَأَعْفُوا اللِّحَى ".
Narrated Ibn `Umar:Allah's Messenger (ﷺ) said, "Cut the moustaches short and leave the beard (as it is)
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: 77:110