وَإِذۡ تَأَذَّنَ رَبُّكُمۡ لَئِن شَكَرۡتُمۡ لَأَزِيدَنَّكُمۡۖ وَلَئِن كَفَرۡتُمۡ إِنَّ عَذَابِي لَشَدِيدٞ
And when your Lord proclaimed, ‘If you are grateful, I will surely enhance you [in blessing], but if you are ungrateful, My punishment is indeed severe.’
Author: Ali Quli Qarai