One Piece Chapter 6, page 18: Chapter 6: Number One

Luffy grabs Morgan by his collar, preparing to finish him off, and yells, "YOU AND YOUR NAVY... ARE RUINING KOBY'S DREAM!" Suddenly, a voice interrupts the battle, screaming, "STOP!! I SAID STOP, YOU IDIOT!!" Luffy and Zoro pause and look over in surprise to see what is happening.