Source: p 236, With Good Reason, An Introduction to Informal Fallacies (2000 6 ed) by York U. Prof. S. Morris Engel
A more straightforward example would be this statement to a jury by the renowned criminal lawyer Clarence Darrow:
c) You folks think we city people are all crooked. but city people think you farmers are all crooked. There isn't one of you I'd trust in a horse trade, because you'd sure to skin me. But when it comes to having sympathy with a person in trouble, I'd sooner trust you folks than city folks, because you come to know people better get to be closer friends. (Quoted in Irving Stone. Clarence Darrow for the Defense: A Biography)
Darrow's argument pleads for sympathy by appealing to the innate goodwill of the jurors.
How is the above an Appeal to Pity? It appears a Valid (but Unsound) Deductive Argument:
Premise 1. All farmers sympathise with a person in trouble.
Premise 2. I trust people who sympathise with a person in trouble.
Conclusion: 3. I trust farmers.