Quran 46:21 from Surah Al-Ahqaf on Divine Marvels.
۞وَٱذۡكُرۡ أَخَا عَادٍ إِذۡ أَنذَرَ قَوۡمَهُۥ بِٱلۡأَحۡقَافِ وَقَدۡ خَلَتِ ٱلنُّذُرُ مِنۢ بَيۡنِ يَدَيۡهِ وَمِنۡ خَلۡفِهِۦٓ أَلَّا تَعۡبُدُوٓاْ إِلَّا ٱللَّهَ إِنِّيٓ أَخَافُ عَلَيۡكُمۡ عَذَابَ يَوۡمٍ عَظِيمٖ
English translation: And mention (the) brother (of) Aad when he warned his people in the Al-Ahqaf and had already passed away and had already passed away [the] warners before him before him before him and after him and after him That not you worship except Allah Indeed, I [I] fear for you a punishment (of) a Day Great
Transliteration: wa-udh'kur akha adin idh andhara qawmahu bil-ahqafi waqad khalati al-nudhuru min bayni yadayhi wamin khalfihi alla ta'budu illa al-laha inni akhafu alaykum adhaba yawmin azimin