وَأَنَّ ٱلَّذِينَ لَا يُؤْمِنُونَ بِٱلْـَٔاخِرَةِ أَعْتَدْنَا لَهُمْ عَذَابًا أَلِيمًا
Wa annal lazeena laa yu'minoona bil aakhirati a'tadnaa lahum 'azaaban aleemaa
I że dla tych, którzy nie wierzą w życie ostateczne, przygotowaliśmy karę bolesną.
And for those who do not believe in the hereafter, we have prepared a painful punishment.
This clause is grammatically bound to the one before it: both hang on anna, so the warning arrives inside the same sentence that announces good news. Grammarians noticed the strain and split over which verb governs the second anna — the announcing, which would make a threat part of the good news, or the earlier statement about what the Qur'an guides to. The English has to break the sentence in two; the Arabic does not.