Surah Ibrahim (Abraham), Verse 7

وَاِذْ تَاَذَّنَ رَبُّكُمْ لَىِٕنْ شَكَرْتُمْ لَاَزِیْدَنَّكُمْ وَلَىِٕنْ كَفَرْتُمْ اِنَّ عَذَابِیْ لَشَدِیْدٌ ۟

Wa iz ta azzana Rabbukum la'in shakartum la azeedannakum wa la'in kafartum inna 'azaabee lashadeed

“And remember! your Lord caused to be declared (publicly): "If ye are grateful, I will add more (favours) unto you; But if ye show ingratitude, truly My punishment is terrible indeed."”

Quran 14:7 (Yusuf Ali Translation)