The Messenger of Allah ﷺ said, "Whoever asks for Paradise three times, Paradise says, 'O Allah, admit him into Paradise.' And whoever seeks refuge from the Fire three times, the Fire says, 'O Allah, protect him from the Fire.'"
قال رسول الله ﷺ: من سأل الجنة ثلاث مرات، قالت الجنة: اللهم أدخله الجنة، ومن استجار من النار ثلاث مرات، قالت النار: اللهم أجره من النار.
Tirmidhi (2572), Nasai (5521), and Ibn Majah (4340) all narrated it, and Ibn Hibban (1034) graded it sahih, all of them by way of Abu Ahwas. Ahmad (13173) also narrated it, and Hakim (1/534-535) graded it sahih, by way of Israil. Both of them narrated from Abu Ishaq, from Burayd bin Abu Maryam, from Anas bin Malik, who mentioned it.Its chain is sahih. Hakim said, "This is a hadith with a sahih chain."