Quran 37:170 from Surah As-Saaffaat on Divine Marvels.
فَكَفَرُواْ بِهِۦۖ فَسَوۡفَ يَعۡلَمُونَ
English translation: But they disbelieved in it so soon they will know
Transliteration: fakafaru bihi fasawfa ya'lamuna