My favorite example of compassion in To Kill a Mockingbird comes when Scout's Uncle Jack tends to her injuries on Christmas Day. After Cousin Francis calls Scout (and Atticus) a "nigger-lover," Scout
... split my knuckle to the bone on his front teeth.
When Jack arrives to break them up, Scout tries to run, but Jack tackles her and then spanks her, leaving "seven or eight red marks" on her behind. Scout is still angry when Jack tries to talk with her back at the Finch house in Maycomb, but when he finally allows Scout to explain the whole story, Jack is ready to head back to Finch's Landing to deliver another spanking:
"... wait'll I get my hands on that boy..."
Instead, Jack stays to take care of Scout's bloody knuckles, and he "gallantly bowed me to the bathroom." Cleaning and bandaging Scout's hand, Jack "entertained me" with a story about an old man and a cat. But when Scout asked him
"What's a whore-lady?"
Jack changes the subject and "plunged into another long tale..."