Sahih al-Bukhari 3830
Sahih al-Bukhari · Book 63: Merits of the Helpers in Madinah (Ansaar) · The building of the Ka'bah
Narrated `Amr bin Dinar and 'Ubaidullah bin Abi Yazid:
حَدَّثَنَا أَبُو النُّعْمَانِ ، حَدَّثَنَا حَمَّادُ بْنُ زَيْدٍ ، عَنْ عَمْرِو بْنِ دِينَارٍ ، وَعُبَيْدِ اللَّهِ بْنِ أَبِي يَزِيدَ ، قَالاَ لَمْ يَكُنْ عَلَى عَهْدِ النَّبِيِّ صلى الله عليه وسلم حَوْلَ الْبَيْتِ حَائِطٌ، كَانُوا يُصَلُّونَ حَوْلَ الْبَيْتِ، حَتَّى كَانَ عُمَرُ، فَبَنَى حَوْلَهُ حَائِطًا ـ قَالَ عُبَيْدُ اللَّهِ ـ جَدْرُهُ قَصِيرٌ، فَبَنَاهُ ابْنُ الزُّبَيْرِ.
In the lifetime of the Prophet (ﷺ) there was no wall around the Ka`ba and the people used to pray around the Ka`ba till `Umar became the Caliph and he built the wall around it. 'Ubaidullah further said, "Its wall was low, so Ibn Az-Zubair built it."