Surah Al-Fajr, verse 4

وَلَيَالٍ عَشْرٍۢ ﴿٢﴾

And [by] ten nights

وَٱلشَّفْعِ وَٱلْوَتْرِ ﴿٣﴾

And [by] the even [number] and the odd

هَلْ فِى ذَٰلِكَ قَسَمٌۭ لِّذِى حِجْرٍ ﴿٥﴾

Is there [not] in [all] that an oath [sufficient] for one of perception?

أَلَمْ تَرَ كَيْفَ فَعَلَ رَبُّكَ بِعَادٍ ﴿٦﴾

Have you not considered how your Lord dealt with ʿAad -