Quran 23:114 from Surah Al-Muminoon on Divine Marvels.
قَٰلَ إِن لَّبِثۡتُمۡ إِلَّا قَلِيلٗاۖ لَّوۡ أَنَّكُمۡ كُنتُمۡ تَعۡلَمُونَ
English translation: He will say Not you stayed but a little if only you [you] knew
Transliteration: qala in labith'tum illa qalilan law annakum kuntum ta'lamuna