فَكَيۡفَ تَتَّقُوۡنَ اِنۡ كَفَرۡتُمۡ يَوۡمًا يَّجۡعَلُ الۡوِلۡدَانَ شِيۡبَاۙۖࣗ‏

Then how can you fear, if you disbelieve, a Day that will make the children white- haired