One Piece Chapter 1, page 56: Romance Dawn

The sea monster is knocked out cold, crashing back into the water with a loud "SPLOOSH". Luffy pulls his arm back, smiling: "That what you get, you darn fish!" He sits back in his boat, planning his future: "First things first. I've got to get a crew! I think about 10 men should do. And I'll need a pirate flag!!"