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Ahmed Raza Khan: Mohammed Aqib Qadri:
Then if he divorces her the third time, she will not be lawful to him until she has stayed with another husband; then if the other husband divorces her, it is no sin for these two to reunite if they consider that they can keep the limits of Allah established; these are the limits set by Allah which He explains for people of intellect.

Yusuf Ali:
So if a husband divorces his wife (irrevocably), He cannot, after that, re-marry her until after she has married another husband and He has divorced her. In that case there is no blame on either of them if they re-unite, provided they feel that they can keep the limits ordained by Allah. Such are the limits ordained by Allah, which He makes plain to those who understand.

Pickthal:
And if he hath divorced her (the third time), then she is not lawful unto him thereafter until she hath wedded another husband. Then if he (the other husband) divorce her it is no sin for both of them that they come together again if they consider that they are able to observe the limits of Allah. These are the limits of Allah. He manifesteth them for people who have knowledge.