The Prophet ﷺ said, "In Paradise there is a gate called ar-Rayyan, through which those who fasted will be summoned. Whoever was among those who fasted will enter it, and whoever enters it will never thirst again."
حدثنا محمد بن بشار حدثنا أبو عامر العقدي عن هشام بن سعد عن أبي حازم
عن النبي ﷺ قال إن في الجنة لبابا يدعى الريان يدعى له الصائمون فمن كان من الصائمين دخله ومن دخله لم يظمأ أبدا
Its isnad is hasan. Ibn Majah narrated it in the Book of Fasting, Chapter on the merit of fasting, Hadith 1640, from the hadith of Hisham bin Saad through this same route. Its basic content is agreed upon by Bukhari, Hadith 1896, and Muslim, Hadith 1152.