Sūrat al-Sāffāt, No. 37. Revealed in Makkah, 182 verses.
This Sūrah like all Sūrahs revealed in Makkah discuss the fundamental principles of Tawhīd (Oneness of God) and Ma‘ad (the Hereafter). It’s short and expressive verses counter the rejecters of faith and prove the invalidity of their arguments.
The sūrah takes its name from the word those ranged in ranks (verse 1) which refers to the angels.