The Quran

وَقالَ الَّذينَ كَفَروا لا تَأتينَا السّاعَةُ ۖ قُل بَلىٰ وَرَبّي لَتَأتِيَنَّكُم عالِمِ الغَيبِ ۖ لا يَعزُبُ عَنهُ مِثقالُ ذَرَّةٍ فِي السَّماواتِ وَلا فِي الأَرضِ وَلا أَصغَرُ مِن ذٰلِكَ وَلا أَكبَرُ إِلّا في كِتابٍ مُبينٍ

Muhammad Asad

And yet, they who are bent on denying the truth assert, "Never will the Last Hour come upon us!"¹ Say: "Nay, by my Sustainer! By Him who knows all that is beyond the reach of a created being's perception: it will most certainly come upon you!" Not an atom's weight [of whatever there is] in the heavens or on earth escapes His knowledge; and neither is there anything smaller than that, or larger, but is recorded in [His] clear decree,

This assertion of the godless has a twofold meaning: (1) "The universe is without beginning and without end; it can only change, but can never cease to exist" - which amounts to a denial of the fact that God alone is eternal; and (2) "There is no resurrection and divine judgment as symbolized by the Last Hour" - which amounts to a denial of life after death and, hence of all significance and purpose attaching to human life as such.