Quran 25:65 from Surah Al-Furqaan on Divine Marvels.
وَٱلَّذِينَ يَقُولُونَ رَبَّنَا ٱصۡرِفۡ عَنَّا عَذَابَ جَهَنَّمَۖ إِنَّ عَذَابَهَا كَانَ غَرَامًا
English translation: And those who say Our Lord! Avert from us the punishment (of) Hell Indeed its punishment is inseparable
Transliteration: wa-alladhina yaquluna rabbana is'rif anna adhaba jahannama inna adhabaha kana gharaman