Sahih al-Bukhari 3614
صحيح البخاري#3614SahihNarrated 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 (ﷺ) of that and the Prophet (ﷺ) said, "O so-and-so! Recite, for this (mist or cloud) was a sign of peace descending for the recitation of Qur'an
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Every narration in Sahih al-Bukhari is accepted as Sahih (authentic) by the established status of the book.
In-book reference: 61:121