12:66 qaala lan ursilahuu ma’Akum Hat-taa tu’tuuni mawthiqam minal-laahi lata’tun-naniy bihii il-laa ay yuHaaTa bikum* falam-maa aatawhu mawthiqahum qaalal-laahu ‘Alaa maa naquulu wakiyl

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Ahmed Raza Khan: Mohammed Aqib Qadri:
He said, "I shall never send him with you until you give me an oath upon Allah that you will bring him back to me, unless you are surrounded"; and (recall) when they gave him their oath that "Allah’s guarantee is upon what we say." (* He knew that Bin Yamin would be restrained.)

Yusuf Ali:
(Jacob) said: "Never will I send him with you until ye swear a solemn oath to me, in Allah's name, that ye will be sure to bring him back to me unless ye are yourselves hemmed in (and made powerless). And when they had sworn their solemn oath, he said: "Over all that we say, be Allah the witness and guardian!"

Pickthal:
He said: I will not send him with you till ye give me an undertaking in the name of Allah that ye will bring him back to me, unless ye are surrounded. And when they gave him their undertaking he said: Allah is the Warden over what we say.