Surah Ad-Dukhan, ayah 3

إِنَّآ أَنزَلۡنَٰهُ فِي لَيۡلَةٖ مُّبَٰرَكَةٍۚ إِنَّا كُنَّا مُنذِرِينَ ٣

Innā anzalnāhu fī laylatim mubārakatin innā kunnā mundhirīn

Indeed, We sent it down during a blessed night.¹⁴⁵⁹ Indeed, We were to warn [mankind].