Sahih Bukhari Volume 1, Book 3, Hadith 126

حَدَّثَنَا عُبَيْدُ اللَّهِ بْنُ مُوسَى، عَنْ إِسْرَائِيلَ، عَنْ أَبِي إِسْحَاقَ، عَنِ الأَسْوَدِ، قَالَ قَالَ لِي ابْنُ الزُّبَيْرِ كَانَتْ عَائِشَةُ تُسِرُّ إِلَيْكَ كَثِيرًا فَمَا حَدَّثَتْكَ فِي الْكَعْبَةِ قُلْتُ قَالَتْ لِي قَالَ النَّبِيُّ صلى الله عليه وسلم ‏"‏ يَا عَائِشَةُ، لَوْلاَ قَوْمُكِ حَدِيثٌ عَهْدُهُمْ ـ قَالَ ابْنُ الزُّبَيْرِ بِكُفْرٍ ـ لَنَقَضْتُ الْكَعْبَةَ فَجَعَلْتُ لَهَا بَابَيْنِ باب يَدْخُلُ النَّاسُ، وَبَابٌ يَخْرُجُونَ ‏"‏‏.‏ فَفَعَلَهُ ابْنُ الزُّبَيْرِ‏

Narrated By Aswad : Ibn Az-Zubair said to me, "'Aisha used to tell you secretly a number of things. What did she tell you about the Ka'ba?" I replied, "She told me that once the Prophet said, 'O 'Aisha! Had not your people been still close to the pre-Islamic period of ignorance (infidelity)! I would have dismantled the Ka'ba and would have made two doors in it; one for entrance and the other for exit." Later on Ibn Az-Zubair did the same.