Transience of life

قَـٰلَ كَمْ لَبِثْتُمْ فِى ٱلْأَرْضِ عَدَدَ سِنِينَ

[Allāh] will say, "How long did you remain on earth in number of years?"

وَٱلَّيْلِ إِذْ أَدْبَرَ

And [by] the night when it departs.