Sunan At-Tirmidhi

Al-Aswad bin Yazid narrated that:Ibn Az-Zubair said to him: ""Narrated to me from what the Mother of the Believers used to (secretly) inform you about"" - meaning Aishah - so he said: ""She narrated to me that the Messenger of Allah said: 'Had your people not been still close to the pre-Islamic period of ignorance, then I would demolish the Ka'bah and rebuild it with two doors.'"" He said: ""So when Ibn Az-Zubair came to power he demolished it and rebuilt it with two doors