“I’m sure Hashem will pay me back”

Someone called up R’ Sruli Mayer* and asked him if he wants to sponsor lunch for a learning program. He thought to himself, ‘If I give Tzedakah and help Yidden, I’m sure Hashem will pay me back.” Right after he gave the money, he went to buy a door. The person he was buying it from said, “There’s a little scratch on the bottom of the door, so you can have it for free.” The amount of money saved on the door was the same amount of money that he sponsored for the lunch!