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" (Using translation from Nasāʾī 2955)  

أَنَّ رَسُولَ اللهِ ﷺ كَانَ «يَطُوفُ بِالْبَيْتِ عَلَى رَاحِلَتِهِ فَإِذَا انْتَهَى إِلَى الرُّكْنِ أَشَارَ إِلَيْهِ»