Sahih Muslim , Book 53, Hadith 28 (In-Book) ⓘ

Abu Bakr b. Abdullah b. Qais reported on the authority of his father that Allah's Messenger said that in Paradise there would be a tent made of a single hollowed pearl, the breadth of which would be sixty miles from all sides and there would live a family in each corner and the other would not be able to see the believer who goes around them.

وَحَدَّثَنِي أَبُو غَسَّانَ الْمِسْمَعِيُّ، حَدَّثَنَا أَبُو عَبْدِ الصَّمَدِ، حَدَّثَنَا أَبُو عِمْرَانَ الْجَوْنِيُّ، عَنْ أَبِي بَكْرِ بْنِ عَبْدِ اللَّهِ بْنِ قَيْسٍ، عَنْ أَبِيهِ، أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم قَالَ ‏ "‏ فِي الْجَنَّةِ خَيْمَةٌ مِنْ لُؤْلُؤَةٍ مُجَوَّفَةٍ عَرْضُهَا سِتُّونَ مِيلاً فِي كُلِّ زَاوِيَةٍ مِنْهَا أَهْلٌ مَا يَرَوْنَ الآخَرِينَ يَطُوفُ عَلَيْهِمُ الْمُؤْمِنُ ‏" ‏ ‏.‏