Quran 2:24 from Surah Al-Baqara on Divine Marvels.
فَإِن لَّمۡ تَفۡعَلُواْ وَلَن تَفۡعَلُواْ فَٱتَّقُواْ ٱلنَّارَ ٱلَّتِي وَقُودُهَا ٱلنَّاسُ وَٱلۡحِجَارَةُۖ أُعِدَّتۡ لِلۡكَٰفِرِينَ
English translation: But if not you do and never will you do then fear the Fire whose [its] fuel (is) [the] men and [the] stones prepared for the disbelievers
Transliteration: fa-in lam taf 'alu walan taf 'alu fa-ittaqu al-nara allati waquduha al-nasu wal-hijaratu u'iddat lil'kafirina