There are 19 ayaat in this Surah and it was revealed in Makkah. Imam Ja’far as-Sadiq (a.s.) said that whoever recites this Surah in the daytime or at night, and then passes away, he will be counted amongst the martyrs who died while fighting on the side of the Holy Prophet (S) It is highly recommended to recite this Surah while travelling and it acts as a safety from accidents. If recited on a treasure, it remains safe.