And they used to persist in the great violation, (56:46)

Almuntakhab Fi Tafsir Alquran Alkarim

How obstinate they were in adhering to their own evil course of denying Allah

Tafseer Tafheem-ul-Quran by Syed Abu-al-A'la Maududi

(56:46) and had persisted in the Great Sin. *20

And they used to persist in the great violation, meaning

*20) That is, "Their prosperity had an adverse effect on them. Instead of being grateful to Allah Almighty, they had become deniers of His blessings. Lost in pleasure-seeking they had forgotten God and persisted in heinous sinning. "Heinous sinning" includes disbelief, polytheism and atheism as well as every grave sin of morality and conduct."
 

And they used to persist in the great violation, meaning in Urdu

اور گناہ عظیم پر اصرار کرتے تھے