39:56 an taquula nafsuy yaa Hasrataa ‘Alaa maa far-raTtu fiy jambil-laahi wa in kuntu la minas saakhiriyn

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Ahmed Raza Khan: Mohammed Aqib Qadri:
So that no soul may say, "Alas! The failures that I committed regarding Allah - and indeed I used to mock!"

Yusuf Ali:
"Lest the soul should (then) say: 'Ah! Woe is me!- In that I neglected (my duty) towards Allah, and was but among those who mocked!'-

Pickthal:
Lest any soul should say: Alas, my grief that I was unmindful of Allah, and I was indeed among the scoffers!