The Messenger of Allah ﷺ said, "There is none among you who does not have two dwellings, a dwelling in Paradise and a dwelling in the Fire. When he dies and enters the Fire, the people of Paradise inherit his dwelling. That is the meaning of His statement, 'Those are the inheritors' [Muminun 23:10]."
قال رسول الله ﷺ: ما منكم من أحد إلا له منزلان: منزل في الجنة، ومنزل في النار، فإذا مات، فدخل النار، ورث أهل الجنة منزله، فذلك قوله تعالى: {أوليك هم الورثون}
Ibn Majah (4341), Bayhaqi in Shuab al-Iman (373), and Ibn Abu Hatim, as mentioned by Ibn Kathir in his Tafsir (5/464), all narrated it through the route of Abu Muawiya, from Amash, from Abu Salih, from Abu Hurairah, who said, then he mentioned it. Its isnad is sahih.As for His saying, "Firdaws", this is the highest part of Paradise, its middle, and its best part, as stated in the sahih hadith.