Sahl ibn Sa‘d (may Allah be pleased with him) reported: The Prophet (may Allah's peace and blessings be upon him) said: "There is a gate in Paradise called Ar-Rayyān through which only those who fast will enter on the Day of Resurrection. No one else will enter through it. It will be called out: ‘Where are those who used to fast?’ So they will stand up and proceed towards it. When the last of them has entered, the gate will be closed, and no one else will enter through it.'" Authentic hadith - Narrated by Bukhari & Muslim