AD DUKHAAN — Ayat 3

إِنَّا أَنزَلْنَاهُ فِي لَيْلَةٍ مُّبَارَكَةٍ إِنَّا كُنَّا مُنذِرِينَ

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