The Surah takes its name from the word al-`asr occurring in the first verse
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Period of Revelation
Although Mujahid, Qatadah and Muqatil regard it as a Madani Surah, yet a great majority of the commentators opine that it is Makki; its subject matter also testifies that it must have been sent down in the earliest stage at Makkah, when the message of Islam was being presented in brief but highly impressive sentences so that the listeners who heard them once could not forget them even if they wanted to, for they were automatically committed to memory