Sahih al-Bukhari 502
Narrated Yazid bin Al `Ubaid:
I used to accompany Salama bin Al-Akwa` and he used to pray behind the pillar which was near the 
place where the Qur'ans were kept. I said, "O Abu Muslim! I see you always seeking to pray behind 
this pillar." He replied, "I saw Allah's Messenger (ﷺ) always seeking to pray near that pillar."
حَدَّثَنَا الْمَكِّيُّ بْنُ إِبْرَاهِيمَ، قَالَ حَدَّثَنَا يَزِيدُ بْنُ أَبِي عُبَيْدٍ، قَالَ كُنْتُ آتِي مَعَ سَلَمَةَ بْنِ الأَكْوَعِ فَيُصَلِّي عِنْدَ الأُسْطُوَانَةِ الَّتِي عِنْدَ الْمُصْحَفِ‏.‏ فَقُلْتُ يَا أَبَا مُسْلِمٍ أَرَاكَ تَتَحَرَّى الصَّلاَةَ عِنْدَ هَذِهِ الأُسْطُوَانَةِ‏.‏ قَالَ فَإِنِّي رَأَيْتُ النَّبِيَّ صلى الله عليه وسلم يَتَحَرَّى الصَّلاَةَ عِنْدَهَا‏.‏