وَإِذۡ تَأَذَّنَ رَبُّكُمۡ لَئِن شَكَرۡتُمۡ لَأَزِيدَنَّكُمۡۖ وَلَئِن كَفَرۡتُمۡ إِنَّ عَذَابِي لَشَدِيدٞ
And (remember) when your Lord proclaimed: "If you give thanks, I will give you more; but if you are thankless, verily, My punishment is indeed severe
Author: Safi Ur Rahman Al Mubarakpuri