Al-Muddaththir • EN-AL-JALALAYN
﴿ وَٱلَّيْلِ إِذْ أَدْبَرَ ﴾
“Consider the night when it departs,”
And by the night when it returns! if read as idhā dabara when it comes back after day a variant reading has idh adbara meaning ‘when it has receded’.