Behold, We have revealed it on a Blessed Night, for, verily We have always been warning. (Revealed on the Prophet's heart in a Blessed Night in the month of Ramadhan, 610 C.E., and then conveyed to mankind in stages over a period of 23 years. (2:185), (97:1))
We sent it (this Quran) down on a blessed night ((i.e. night of Qadr, Soorah 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)
We disclosed it during a blessed night (an instance of the experience of non-existence)! We are the warners!
Al-muntakhab fi tafsir al-Qur'an al-Karim
The Book which We began revealing at a blessed and a highly esteemed Night, it is incumbent on Us to send a Messenger as a spectacle and a warning and entrust to him an authoritative Book