Quran 17:10 from Surah Al-Israa on Divine Marvels.
وَأَنَّ ٱلَّذِينَ لَا يُؤۡمِنُونَ بِٱلۡأٓخِرَةِ أَعۡتَدۡنَا لَهُمۡ عَذَابًا أَلِيمٗا
English translation: And that those who (do) not believe in the Hereafter We have prepared for them a punishment painful
Transliteration: wa-anna alladhina la yu'minuna bil-akhirati a'tadna lahum adhaban aliman