Sahih Muslim 509
Sahih Muslim · Book 4: The Book of Prayers · The Praying Person Standing Close To The Sutrah
Yazid reported:
حَدَّثَنَاهُ مُحَمَّدُ بْنُ الْمُثَنَّى ، حَدَّثَنَا مَكِّيٌّ ، قَالَ يَزِيدُ أَخْبَرَنَا قَالَ كَانَ سَلَمَةُ يَتَحَرَّى الصَّلاَةَ عِنْدَ الأُسْطُوَانَةِ الَّتِي عِنْدَ الْمُصْحَفِ فَقُلْتُ لَهُ يَا أَبَا مُسْلِمٍ أَرَاكَ تَتَحَرَّى الصَّلاَةَ عِنْدَ هَذِهِ الأُسْطُوَانَةِ . قَالَ رَأَيْتُ النَّبِيَّ صلى الله عليه وسلم يَتَحَرَّى الصَّلاَةَ عِنْدَهَا .
Salama sought to say prayer near the pillar which was by that place where copies of the Qur'an were kept. I said to him: Abu Muslim. I see you striving to offer your prayer by this pillar. He said: I saw the Messenger of Allah (ﷺ) seeking to pray by its side.