His saying: "Indeed, We have granted you al-Kawthar."

Yahya [narrated] from Uthman, from Qatadah, from Anas ibn Malik who said: The Messenger of Allah [ﷺ] said: "While I was in Paradise, I came upon a river whose banks were domes of hollowed-out pearl. I struck my hand into the water and found it to be pungent musk. I said: 'What is this, O Gabriel?' He said: 'This is al-Kawthar which Allah has granted you.'"