Yusuf - ১২:৬৬

قَالَ لَنْ أُرْسِلَهُ مَعَكُمْ حَتَّى تُؤْتُونِ مَوْثِقًا مِّنَ اللّهِ لَتَأْتُنَّنِي بِهِ إِلاَّ أَن يُحَاطَ بِكُمْ فَلَمَّا آتَوْهُ مَوْثِقَهُمْ قَالَ اللّهُ عَلَى مَا نَقُولُ وَكِيلٌ
[12:66]
He said: I will by no means send him with you until you give me a firm covenant in Allah's name that you will most certainly bring him back to me, unless you are completely surrounded. And when they gave him their covenant, he said: Allah is the One in Whom trust is placed as regards what we say.
(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!"
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.