Surat al-Kawthar (Arabic: سورة الكوثر) ("Abundance") is the 108th sura of the Qur'an, and the shortest. There are several differing reports as to the circumstances under which it was revealed. According to Ibn Ishaq, it was revealed in Makka, some time before the Isra and Miraj, when A'as ibn Wa'il as-Sahmi said of Muhammad that he was "a man who is cut off and is of no consequence, and if he were killed, he would be forgotten"; others report that it was revealed in regard to Ka'b ibn al-Ashraf (according to al-Bazzar), or (according to Ataa) Abu Lahab when he said, after Muhammad's son died, that Muhammad would be forgotten since he had no sons, or (according to Anas ibn Malik) that it was revealed while he was dozing among his companions and he smiled.
Tradition has it that al-Kawthar (from a root meaning "the river in paradise"), a word that occurs only once in the Qur'an, is the name of a river in Paradise. On Yaum al-Qiyamah (the Day of Judgement) all of those who truly believed in Allah will be led to al-Kawthar where they will drink only once, and will never hunger or thirst again.
Jesus replied: "Everyone who drinks of this water will thirst again, but whosoever drinks of the water of the living spirit shall never thirst. And this living water shall become in him a well of refreshment springing up even to eternal life."