Just remembered this one. My grandma told me it. Back in the 30s when she was a young girl, her father's best friend was one of the biggest rice merchants in Baghdad and he was Jewish (Ezra). He used to own the shop next to my grandma's dad's shop. Every year, he would go to the South of Iraq where the rice farmers/suppliers are to buy rice and then he would sell it in Baghdad.
One year, he spent all his money buying as much rice as he could because the quality of the rice was exceptional that year and he thought everybody in Baghdad would like it so that he would sell it all immediately and make a big profit.
So he paid half of the money, and went back to Baghdad and made an agreement with the provider to pay the other half on delivery. As you might expected, the delivery crew got ambushed and killed in the way and the rice disappeared. Everyone accused the provider and he was arrested. They searched his house and farm but didn't find the rice.
Anyway months passed and Ezra was forced to sell his shop. My grandma's father took him to a trip to
Karbala to cheer him up and he took my grandma with them. They visited
Abbas' Shrine and my grandma's dad donated some money to the shrine in the name of Ezra and asked Allah to find Ezra's rice.
Long story short Ezra had a dream that night. A man with a beautiful bright face on a white horse......etc (you get the idea) came to him and told him that his main competitor was the one who stole the rice and that he had hidden it in a storage site near where the ambush took place.
He woke up and informed the police immediately (who apparently at the time regarded holy dreams as evidence

). They went to the site and found the rice and his main competitor was jailed.
And even though Ezra didn't convert to Islam and died a Jew, he kept donating 10% of his profits to Abbas' shrine every year until he died.

P.S: I miss my grandmother