Sahih Muslim
The Book of Prayers (Kitab Al-Salat)
Book Number: 004 / Hadith Number: 1031
Yazid reported: 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 (may peace be upon him) seeking to pray by its side.