Al-Bara' reported that a person was reciting Surat al-Kahf and there was a horse tied with two ropes at his side, a cloud overshadowed him, and as it began to come nearer and nearer his horse began to take fright from it. He went and mentioned that to the Prophet (ﷺ) in the morning, and he (the Holy Prophet) said:
That was tranquillity which came down at the recitation of the Qur'an.
Reference: Sahih Muslim 795 a In-book : Book 6, Hadith 284 USC-MSA web (English) : Book 4, Hadith 1739 (deprecated)
Help us gift a modern, ad-free Islamic application for the Muslim Ummah. Your donation will be recorded as Sadaqah Jariyah in your book of deeds, In Sha Allah.