The Prophet ﷺ said, "In Paradise there are eight gates, among them a gate called al-Rayyan, through which none shall enter except those who fasted."
عن النبي ﷺ قال: في الجنة ثمانية أبواب، فيها باب يسمى الريان، لا يدخله إلا الصائمون.
Bukhari narrated it in the Book of the Beginning of Creation (3257), from Saeed bin Abu Maryam, who said, Muhammad bin Mutarrif narrated to us, who said, Abu Hazim narrated to me, from Sahl bin Saad, and he mentioned it.