Sunan Ibn Majah, Hadith 1640 ⓘ
It was narrated from Sahl bin Sa’d that the Prophet said: “In Paradise there is a gate called Rayyan. On the Day of Resurrection the call will go out saying: ‘Where are those who used to fast?’ Whoever is among those who used to fast will enter it, and whoever enters it will never thirst again.”
حَدَّثَنَا عَبْدُ الرَّحْمَنِ بْنُ إِبْرَاهِيمَ الدِّمَشْقِيُّ، حَدَّثَنَا ابْنُ أَبِي فُدَيْكٍ، حَدَّثَنِي هِشَامُ بْنُ سَعْدٍ، عَنْ أَبِي حَازِمٍ، عَنْ سَهْلِ بْنِ سَعْدٍ، أَنَّ النَّبِيَّ ـ صلى الله عليه وسلم ـ قَالَ " إِنَّ فِي الْجَنَّةِ بَابًا يُقَالُ لَهُ الرَّيَّانُ يُدْعَى يَوْمَ الْقِيَامَةِ يُقَالُ أَيْنَ الصَّائِمُونَ فَمَنْ كَانَ مِنَ الصَّائِمِينَ دَخَلَهُ وَمَنْ دَخَلَهُ لَمْ يَظْمَأْ أَبَدًا " .
also referenced under: Book 7, Hadith 1709 (In-Book) & Volume 2, Book 7, Hadith 1640 (DarusSalam)