29:66 li yakfuruu bimaa aataynaahum wa li yatamat-ta'UU fa sawfa ya'Ålamuun

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Ahmed Raza Khan: Mohammed Aqib Qadri:
In order to be ungrateful for Our favours; and to use the comforts; therefore they will soon come to know.

Yusuf Ali:
Disdaining ungratefully Our gifts, and giving themselves up to (worldly) enjoyment! But soon will they know.

Pickthal:
That they may disbelieve in that which We have given them, and that they may take their ease. But they will come to know.