The Surah takes its name from the alphabetic letter Suad with which it begins.
Period of Revelation
As will be explained below, according to some traditions this Surah was sent down in the period when the Holy Prophet had started calling the people openly to Islam in Makkah, and this had caused great alarm among the chiefs of the Quraish. If this be true, its period of revelation would be about the 4th year of the Prophethood. According to some other traditions, it was sent down after Hadrat Umar's embracing Islam, and this happened, as is well known, after the migration to Habash. Another chain of the traditions shows that the event which occasioned the revelation of this Surah took place during the last illness of Abu Talib. If this be correct, the period of its revelation would be the 10th or 11th year of the Prophethood.
Here is a resume of the traditions related by Imam Ahmad, Nasa'i, Tirmidhi, Ibn Jarir, Ibn Abi Shaibah, Ibn Abu Hatim, Muhammad bin Is