It is narrated from Hazrat Ibn Umar (may Allah be pleased with them) that I asked Hazrat Bilal (may Allah be pleased with him) where the Holy Prophet (peace and blessings of Allah be upon him) prayed when he entered the Ka'bah. He replied: Between two pillars (and at that time there was a distance of three cubits between the Holy Prophet (peace and blessings of Allah be upon him) and the wall).
Hadith Referenceمسند احمد / مسند الأنصار رضي الله عنهم / 23900
Hadith Gradingحکم دارالسلام:حديث صحيح، خ: 397، م: 1329، وهذا إسناد حسن فى المتابعات والشواهد من أجل هشام بن سعد