Qur'ān 23:114 · Al-Mu'minun (المؤمنون)

قَـٰلَ إِن لَّبِثْتُمْ إِلَّا قَلِيلًۭا ۖ لَّوْ أَنَّكُمْ كُنتُمْ تَعْلَمُونَ

He will say, "You stayed not but a little - if only you had known.