Sunan an-Nasa'i 2955
سنن النسائي#2955Sahihأَخْبَرَنَا بِشْرُ بْنُ هِلاَلٍ، قَالَ أَنْبَأَنَا عَبْدُ الْوَارِثِ، عَنْ خَالِدٍ، عَنْ عِكْرِمَةَ، عَنْ عَبْدِ اللَّهِ بْنِ عَبَّاسٍ، أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم كَانَ يَطُوفُ بِالْبَيْتِ عَلَى رَاحِلَتِهِ فَإِذَا انْتَهَى إِلَى الرُّكْنِ أَشَارَ إِلَيْهِ .
It was narrated from Abdullah bin Abbas that:the Messenger of Allah used to circumambulate the House on his mount, and when he reached the Corner be pointed to it." (Sahih) Chpater 161. They Saying Of Allah, The Mighty And Sublimse: "Take Your Adornment To Every Masjid
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:
In-book reference: 24:338