Quran 3:131 from Surah Aal-i-Imraan on Divine Marvels.
وَٱتَّقُواْ ٱلنَّارَ ٱلَّتِيٓ أُعِدَّتۡ لِلۡكَٰفِرِينَ
English translation: And fear the Fire which is prepared for the disbelievers
Transliteration: wa-ittaqu al-nara allati u'iddat lil'kafirina