وَاِذْ تَاَذَّنَ رَبُّكُمْ لَىِٕنْ شَكَرْتُمْ لَاَزِيْدَنَّكُمْ وَلَىِٕنْ كَفَرْتُمْ اِنَّ عَذَابِيْ لَشَدِيْدٌ۷
Waith taaththana rabbukum lain shakartum laazeedannakum walain kafartum inna AAathabee lashadeedun
Remember, your Lord proclaimed: "I shall give you more if you are grateful; but if you are thankless then surely My punishment is very great."