The Book of Prayers (Kitab Al-Salat)
Muslim :: Book 4 : Hadith 1740
Ibn Ishaq reported: I heard al-Bara' as saying that a man recited al-Kahf when an animal was there in the house and it began to take fright. And as he looked around, he found a cloud overshadowing it. He mentioned that to the Apostle of Allah (may peace be upon him). Upon this he said: O so and so, recite on (the surah) as- Sakina descends at the (recitation of the Qur'an) or on account (of the recitation) of the Qur'an.
Source materials are from the University of Southern California MSA site|
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