Narrated Salim that his father said: Allah's Apostle, Usama bin Zaid, Bilal, and `Uthman bin abu Talha entered the Ka`ba and then closed its door. When they opened the door I was the first person to enter (the Ka`ba). I met Bilal and asked him, Did Allah's Apostle offer a prayer inside (the Ka`ba)? Bilal replied in the affirmative and said, (The Prophet offered the prayer) in between the two right pillars.