The Prophet (sallallaahu 'alayhe wa sallam) said:
“Whoever controls his anger at the time when he has the means to
act upon it, Allaah will call him before all of mankind on the Day of
Resurrection, and will let him choose of the Hoor al-‘Ayn whoever
he wants.”
(Reported by Aboo Daawood, 4777, and others.
It is classified as hasan in Saheeh al-Jaami‘, 6518).
