﴿ وَإِذْ تَأَذَّنَ رَبُّكُمْ لَئِن شَكَرْتُمْ لَأَزِيدَنَّكُمْ ۖ وَلَئِن كَفَرْتُمْ إِنَّ عَذَابِى لَشَدِيدٌۭ ﴾

“And [remember the time] when your Sustainer made [this promise] known: 'If you are grateful [to Me], I shall most certainly give you more and more; but if you are ungrateful, verily, My chastisement will be severe indeed!"'”

(And when your Lord proclaimed) when your Lord said and informed you in the Scripture: (If ye give thanks) for your success, safety, favour and blessings, (I will give you more) success, safety, favour and blessings; (but if ye are thankless) if you do not believe me or are ungrateful for the blessings bestowed upon you, (lo! my punishment is dire) for the one who disbelieves.