حَدَّثَنَا هَنَّادُ بْنُ السَّرِيِّ، حَدَّثَنَا ابْنُ فُضَيْلٍ، عَنِ الْمُخْتَارِ بْنِ فُلْفُلٍ، قَالَ سَمِعْتُ أَنَسَ بْنَ مَالِكٍ، يَقُولُ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم ‏"‏أُنْزِلَتْ عَلَىَّ آنِفًا سُورَةٌ ‏"‏ ‏.‏ فَقَرَأَ بِسْمِ اللَّهِ الرَّحْمَنِ الرَّحِيمِ ‏‏{‏ إِنَّا أَعْطَيْنَاكَ الْكَوْثَرَ ‏}‏ حَتَّى خَتَمَهَا ‏.‏ قَالَ ‏"‏ هَلْ تَدْرُونَ مَا الْكَوْثَرُ ‏"‏ ‏.‏ قَالُوا اللَّهُ وَرَسُولُهُ أَعْلَمُ ‏.‏ قَالَ ‏"‏ فَإِنَّهُ نَهْرٌ وَعَدَنِيهِ رَبِّي فِي الْجَنَّةِ ‏"

Anas b. Malik said

The Messenger of Allah (ﷺ) said: "A surah has just been revealed to me." Then he recited: "In the name of Allah, the Most Gracious, the Most Merciful. {Lo! We have given thee Al-Kawthar}" until he finished it. He said: "Do you know what Al-Kawthar is?" They replied: "Allah and His Messenger know best." He said: "It is a river which my Lord has promised me in Paradise."