in Paradise there is a gate called Ar'Rayyan, it will be said on the Day of Resurrection: "Where are those who used to fast? Would you like to enter through Ar-Rayyan?" whoever enters through it will never thirst again. Then when they have entered it will be closed behind them, and no one but they will enter through it.  

يُقَالُ يَوْمَ الْقِيَامَةِ أَيْنَ الصَّائِمُونَ هَلْ لَكُمْ إِلَى الرَّيَّانِ مَنْ دَخَلَهُ لَمْ يَظْمَأْ أَبَدًا فَإِذَا دَخَلُوا أُغْلِقَ عَلَيْهِمْ فَلَمْ يَدْخُلْ فِيهِ أَحَدٌ غَيْرُهُمْ  

[Machine] The Messenger of Allah ﷺ said, "Indeed, in Paradise, there is a gate called Ar-Rayan. On the Day of Resurrection, it will be said, 'Where are the fasting ones?' So those who fasted will enter it and no one else will enter it, and when the last person among them enters, it will be closed and no one else will enter except for them."  

قَالَ رَسُولُ اللهِ ﷺ إِنَّ فِي الْجَنَّةِ بَابًا يُقَالُ لَهُ الرَّيَّانُ يُقَالُ يَوْمَ الْقِيَامَةِ أَيْنَ الصَّائِمُونَ؟ هَلْ لَكُمْ إِلَى الرَّيَّانِ مَنْ دَخَلَ مِنْهُ لَمْ يَظْمَأْ أَبَدًا فَيَدْخُلُونَ فِيهِ فَإِذَا دَخَلَ آخِرُهُمْ أُغْلِقَ فَلَمْ يَدْخُلْ مِنْهُ أَحَدٌ غَيْرُهُمْ