One Piece Chapter 7, page 4-5: Chapter 7: Friends

Luffy cheerfully announces, "WE'RE HEADED FOR THE GRAND LINE!" Koby is completely shocked, screaming, "HUH!? THAT'S SUICIDE!!! THERE ARE ONLY TWO OF YOU! IF YOU GO THERE, YOU'LL JUST BE SAILING TO YOUR DEATHS! THE MOST BLOODTHIRSTY PIRATES IN THE WORLD ARE THERE!!!" Luffy looks unbothered. Zoro grins and says, "WELL, I GUESS IF WE'RE AFTER THE 'ONE PIECE'......THE GRAND LINE IS WHERE WE HAVE TO GO." Koby turns to Zoro in disbelief, crying, "ZOLO!? YOU AGREE WITH HIM!?" Luffy tells Koby, "WHAT'S IT TO YOU? YOU'RE NOT COMING WITH US.

Koby slams his hands on the table with a loud "BAM SLAM!" and yells, "NO, BUT I'M WORRIED ABOUT YOU! IS THAT SO WRONG!?" Luffy calmly replies, "CAN'T I WORRY ABOUT... MY FRIENDS?" Koby stammers, "THAT'S NOT WHAT I--" and then says, "LUFFY, WE HAVEN'T KNOWN EACH OTHER FOR VERY LONG, BUT......WE'RE FRIENDS, AREN'T WE?" Luffy smiles widely and says, "WE'RE GOING OUR SEPARATE WAYS......BUT WE'LL ALWAYS BE FRIENDS!!" Koby is deeply moved, thinking, "YOU'RE THE FIRST REAL FRIEND I'VE EVER HAD... NO ONE ELSE EVER STUCK UP FOR ME! EVEN I WOULDN'T STICK UP FOR ME!" Zoro and Luffy watch him.