Sahih Muslim — The Book of Paradise, its Description, its Bounties and its Inhabitants — Hadith No: 7159
Translation
Abu Bakr b. Abdullah b. Qais reported on the authority of his father that Allah's Messenger (ﷺ) 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