Sūrah No. 41. Also known as Sūrat HāMīm Sajdah. Revealed in Makkah, 54 verses. It is second of the four Sūrahs which contain wājib sajdah. Other are Sūrah nos. 32, 53 and 96.
The Sūrah takes its name from the description of the Quran in verse 3 as a Book whose signs have been elaborated.
The Sūrah is the second of the Hawāmīm Sūrahs (those that begin with Hā-Mīm, Sūrah Nos. 40-46). According to the Holy Prophet a, the Hawāmīim are the crown of the Quran.
The main theme of this Sūrah is the truth of the Quran and the ineffectiveness of those who oppose it.