Chapter 16: The Book of Pilgrimage
' A' isha (Allah be pleased with her) reported: Allah' s Messenger may peace be upon him) said to me: Had your people not been unbelievers in the recent past (had they not quite recently accepted Islam), I would have demolished the Ka' ba and would have rebuilt it on the foundation (laid) by Ibrahim; for when the Quraish had built the Ka' ba, they reduced its (area), and I would also have built (a door) in the rear.
Sahih Muslim 1333a