Volume 4, Book 56, Number 811:
Narrated Al-Bara’ bin ‘Azib:
A man recited Surat-al-Kahf (in his prayer) and in the house there was a (riding) animal which
got frightened and started jumping. The man finished his prayer with Taslim, but behold! A mist or a
cloud hovered over him. He informed the Prophet of that and the Prophet said, “O so-and-so! Recite,
for this (mist or cloud) was a sign of peace descending for the recitation of Quran.”