At the end of Chapter One of Harper Lee's To Kill a Mockingbird, after being harassed by Dill and even Scout. Dill indicates that going onto the Radley property should not be such a big deal, and almost shames Jem into going, making him feel like a coward.
Ultimately the boys come to an agreement so all Jem has to do is smack the side of the house. He works up his courage, and finally runs in as fast as he can, smacking the side of the house and running away again, having fulfilled his end of the dare.
Jem is relieved to have this out of the way, but as they move away, Scout reports a tiny movement from one of the house's shutters before everything becomes still again.