﴿ بِّسْمِ ٱللَّهِ ٱلرَّحْمَٰنِ ٱلرَّحِيمِ إِنَّآ أَنزَلْنَٰهُ فِى لَيْلَةِ ٱلْقَدْرِ ﴾

“BEHOLD, from on high have We bestowed this [divine writ] on Night of Destiny.”

A particular night of the year (perhaps some night in the last days of the month of Ramadan) is the night of decisions by God. Certain tasks have to be performed in the course of the year in connection with the administration of the world, and the angels descend to the earth to arrange for them to be carried out. On a similar particular night, the revelation of the Quran began.