The Quran

وَما خَلَقنَا السَّماءَ وَالأَرضَ وَما بَينَهُما باطِلًا ۚ ذٰلِكَ ظَنُّ الَّذينَ كَفَروا ۚ فَوَيلٌ لِلَّذينَ كَفَروا مِنَ النّارِ

Muhammad Asad

AND [thus it is:] We have not created heaven and earth and all that is between them without meaningand purpose, as is the surmise of those who are bent on denyin the truth:¹ but then, woe from the fire [of hell] unto all who are bent on denying the truth!²

Cf. 3: 191. The above statement appears in the Qur'an in several formulations; see, in particular, note 11 on 10:5. In the present instance it connects with the mention of the Day of Reckoning in the preceding verse, thus leading organically from a specific aspect of David's story to a moral teaching of wider import.
I.e., a deliberate rejection of the belief that the universe - and, in particular, human life - is imbued with meaning and purpose leads unavoidably - though sometimes imperceptibly - to a rejection of all moral imperatives, to spiritual blindness and, hence, to suffering in the life to come.