Hazrat Abu Huraira (may Allah be pleased with him) narrates that the Prophet (peace and blessings be upon him) said: Among the Children of Israel, there was a man who asked another man for a loan of one thousand dinars. The lender asked for witnesses. The borrower replied, "Allah is sufficient as a witness." The lender said, "Alright, provide a guarantor." The borrower replied, "Allah is sufficient as a guarantor." The lender said, "You have spoken the truth." Saying this, he gave him one thousand gold coins for a fixed period.

The man who took the money set out on a sea journey, completed his work, and then searched for a ship to return so that he could repay the loan within the specified time, but he could not find a ship. Compelled, he filled the gold coins into a (hollow) piece of wood, placed a letter inside it addressed to the lender, sealed it tightly, and cast the wood into the river. He said, "O Allah, You know that I borrowed one thousand gold coins from such-and-such a person. When he asked for a guarantor, I said that Allah is sufficient as a guarantor, and he was satisfied with Your guarantee. Then he asked for witnesses, and I said that Allah is sufficient as a witness, and he was satisfied with Your testimony and gave me the money. Now I have tried hard to find a ship so that I could deliver the money to him, but I could not find one. Now I entrust these gold coins to You." Saying this, he cast the wood into the sea, and the wood sank into the water. After casting the wood, he returned and continued searching for a ship on his way back so that he could reach his city.

Coincidentally, one day the lender went to the river to see if perhaps a ship had brought his money (he did not find a ship, but he saw the same piece of wood filled with gold coins). He brought it home for firewood, but when he broke it open, he found the money and the letter. After some time, the borrower also arrived and brought one thousand gold coins with him. He said, "By Allah, I kept trying to find a ship so that I could deliver your money to you, but I could not find a ship before now." The lender asked, "Did you send me anything?" The borrower replied, "Yes, I will tell you. Since I could not find a ship before, I sent the money filled inside a piece of wood." The lender said, "So, the money you sent inside the wood, Allah delivered it to me on your behalf. Therefore, you may return with your one thousand dinars in success."