The line comes from One Piece, Eiichiro Oda's long-running manga and anime about pirates searching for the legendary treasure of the same name. It is spoken by Edward Newgate, known as Whitebeard, during the Marineford War, when he confirms the treasure's existence to the world before his death. The moment became one of the series' most quoted scenes, shared in edits, reaction videos and memes whenever creators want to confirm something long rumoured. Its staying power comes from the promise it represents for fans.