33:5 ud'UUhum li aabaaihim huwa aqsaTu 'Indal-laah* fail lam ta'Ålamuu aabaa-ahum fa ikhwaanukum fid diyni wa mawaaliykum* wa laysa 'Alaykum junaaHun fiymaa akhTa'tum bihii walaakim maa ta'Am-madat quluubukum* wa kaanal-laahu gafuurar raHiymaa

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Ahmed Raza Khan: Mohammed Aqib Qadri:
Call them with their fathers' names - this is more suitable in the sight of Allah; and if you do not know their fathers, then they are your brothers in the faith, (and your cousins as humans) and your friends; and there is no sin upon you for what you did unknowingly in the past - however it is a sin what you do with your heart's intention; and Allah is Oft Forgiving, Most Merciful.

Yusuf Ali:
Call them by (the names of) their fathers: that is juster in the sight of Allah. But if ye know not their father's (names, call them) your Brothers in faith, or your maulas. But there is no blame on you if ye make a mistake therein: (what counts is) the intention of your hearts: and Allah is Oft-Returning, Most Merciful.

Pickthal:
Proclaim their real parentage. That will be more equitable in the sight of Allah. And if ye know not their fathers, then (they are) your brethren in the faith, and your clients. And there is no sin for you in the mistakes that ye make unintentionally, but what your hearts purpose (that will be a sin for you). Allah is ever Forgiving, Merciful.