The Messenger of Allah ﷺ said, "A space in Paradise the size of a bow or a whip is better than everything the sun rises and sets upon."
وبهذا الإسناد قال قال رسول الله ﷺ لقاب قوس أو سوط في الجنة خير مما تطلع عليه الشمس وتغرب
Its isnad is sahih, Bukhari narrated it in 4/20 and 144, in the chapter on the beginning of creation, what has been said about the description of Paradise, with this wording.