Quran 2:209 from Surah Al-Baqara on Divine Marvels.
فَإِن زَلَلۡتُم مِّنۢ بَعۡدِ مَا جَآءَتۡكُمُ ٱلۡبَيِّنَٰتُ فَٱعۡلَمُوٓاْ أَنَّ ٱللَّهَ عَزِيزٌ حَكِيمٌ
English translation: Then if you slip from after [what] came to you (from) the clear proofs then know that Allah (is) All-Mighty All-Wise
Transliteration: fa-in zalaltum min ba'di ma jaatkumu al-bayinatu fa-i'lamu anna al-laha azizun hakimun