Abu Hurairah reported,

The Messenger of Allah ﷺ mentioned a man from the Children of Israil who asked another man from the Children of Israil to lend him a thousand dinars.The lender said, "Bring me witnesses so I may have them witness the loan."The borrower replied, "Allah is sufficient as a witness."The lender said, "Then bring me a guarantor."He replied, "Allah is sufficient as a guarantor."The lender said, "You have spoken truly," and handed the money over to him for a specified term.The borrower set out across the sea, took care of his affairs, then sought a vessel to take him back so he could repay the debt by its appointed time, but he could find no vessel. So he took a piece of wood, hollowed it out, placed inside it a thousand dinars along with a letter to his creditor, then sealed up the opening. He brought it to the sea and said, "Allah, You know that I borrowed a thousand dinars from so-and-so. He asked me for a guarantor and I said, 'Allah is sufficient as a guarantor,' and he was content with You. He asked me for a witness and I said, 'Allah is sufficient as a witness,' and he was content with that. I have tried hard to find a vessel to send him what is owed, but I have not been able to. So I now entrust this to You."He cast it into the sea until it disappeared into the water, then he turned away, still seeking a vessel that would carry him to his own land.Meanwhile, the man who had lent him the money went out hoping that perhaps a ship had arrived bringing his money. Instead, he came upon the piece of wood containing the money. He took it home as firewood for his family, but when he sawed it open, he found the money and the letter.Later, the borrower arrived bringing the thousand dinars and said, "By Allah, I kept striving to find a vessel so I could bring you your money, but I could find none before the one I came on."The lender asked, "Did you send me anything?"He replied, "I am telling you, I could find no vessel before the one I have just come on."The lender said, "Indeed, Allah has discharged on your behalf what you sent in the piece of wood. So return with your thousand dinars rightly guided."

عن أبي هريرة

عن رسول الله ﷺ أنه ذكر رجلا من بني إسرائيل سأل بعض بني إسرائيل أن يسلفه ألف دينار فقال: ائتني بالشهداء أشهدهم، فقال: كفى بالله شهيدا. قال: فائتني بالكفيل، قال: كفى بالله كفيلا. قال: صدقت، فدفعها إليه على أجل مسمى. فخرج في بحر فقضى حاجته، ثم التمس مركبا يركبها يقدم عليه للأجل الذي أجله فلم يجد مركبا، فأخذ خشبة فنقرها فأدخل فيها ألف دينار وصحيفة منه إلى صاحبه، ثم زجج موضعها، ثم أتى بها إلى البحر فقال: اللهم إنك تعلم أني كنت تسلفت فلانا ألف دينار فسألني كفيلا فقلت: كفى بالله كفيلا، فرضي بك. وسألني شهيدا فقلت: كفى بالله شهيدا فرضي بذلك. وإني جهدت أن أجد مركبا أبعث إليه الذي له فلم أقدر، وإني أستودعكها. فرمى بها في البحر حتى ولجت فيه، ثم انصرف وهو في ذلك يلتمس مركبا يخرج بها إلى بلده، فخرج الرجل الذي كان أسلفه ينظر لعل مركبا قد جاء بماله، فإذا بالخشبة التي فيها المال، فأخذها لأهلها حطبا، فلما نشرها وجد المال والصحيفة، ثم قدم الذي كان أسلفه فأتى بالألف دينار، فقال: والله ما زلت جاهدا فى طلب مركب لآتيك بمالك فما وجدت مركبا قبل الذي أتيت فيه. قال: هل كنت بعثت إلي بشيء؟ قال: أخبرك أني لم أجد مركبا قبل الذي جئت فيه. قال: فإن الله قد أدى عنك الذي بعثت في الخشبة، فانصرف بالألف الدينار راشدا.