قَٰلَ إِن لَّبِثْتُمْ إِلَّا قَلِيلًا ۖ لَّوْ أَنَّكُمْ كُنتُمْ تَعْلَمُونَ
Commentary:
The divine rejoinder to disbelievers will be that worldly life and its pleasures or comforts were indeed transitory and very short-lived but they had never realized this fact and so kept on indulging in idle pursuits and mocking at God’s Messengers and their followers as if there would be no end to this life. If they had only realized the transitoriness of this life, they would not have rejected the Divine Messengers.