Thought of another, more recent (don't know why I didn't think of this before).
The wife & I had bought a house last year, and we'd been struggling a bit. A friend from my church heard about our struggle & loaned us a $1,000.00
A couple months later I went to him to discuss re-payment plans, and before I could hardly utter two words he told me that he has been blessed in his life and therefore he wanted to return the blessings.
He then said "Merry Christmas, you owe me nothing."