Hadith 8:2792
Abu Bakr narrated to us, he said: Waki’ narrated to us, from Khalifah ibn Khayyat, from ‘Amr ibn Shu’ayb, from his father, from his grandfather, that the Prophet (peace and blessings of Allah be upon him) delivered a sermon while his back was leaning against the Ka’bah.
حدثنا أبو بكر قال نا وكيع عن خليفة بن خياط عن عمرو بن شعيب عن أبيه عن جده أن النبي صلى الله عليه وسلم خطب وهو مسند ظهره إلى الكعبة