We sent it (this Qur’an) down on a blessed night [(i.e. night of Al-Qadr, Surah No. 97) in the month of RAMADAN – the 9th month of the Islamic calendar]. Verily, We are ever warning [mankind that Our Torment will reach those who disbelieve in Our Oneness of Lordship and in Our Oneness of worship].
( سورة الدخان , Ad-Dukhan, Chapter #44, Verse #3)