Al-'Asr 103:1 والعصر ١

Which was revealed in Makkah

How `Amr bin Al-`As was aware of the Qur'an's Miracle due to this Surah

They have mentioned that `Amr bin Al-`As went to visit Musaylimah Al-Kadhdhab after the Messenger of Allah ﷺ was commissioned (as a Prophet) and before `Amr had accepted Islam. Upon his arrival, Musayl