Word by Word Analysis

كَأَنَّهُمْ يَوْمَ يَرَوْنَهَا لَمْ يَلْبَثُوٓا۟ إِلَّا عَشِيَّةً أَوْ ضُحَىٰهَا 46

It will be, on the Day they see it, as though they had not remained [in the world] except for an afternoon or a morning thereof.