وَاِذۡ تَاَذَّنَ رَبُّكُمۡ لَٮِٕنۡ شَكَرۡتُمۡ لَاَزِيۡدَنَّـكُمۡ وَلَٮِٕنۡ كَفَرۡتُمۡ اِنَّ عَذَابِىۡ لَشَدِيۡدٌ
And (recall) when your Lord proclaimed: ‘If you thank, I shall certainly increase (My blessings on) you, and if you are ungrateful, then My torment is surely severe.’