At the end of the movie, Aunt May's tombstone reads: "If you help someone, you help everyone." While some may think this references her advice to Peter about helping Green Goblin and the other villains, it actually runs much deeper than that. The line comes directly from Marvel's Spider-Man video game, during which Aunt May says the same thing to Peter and the rest of her acquaintances at F.E.A.S.T. homeless shelter (which also makes an appearance in No Way Home), where she volunteers. Spoiler alert: when May dies in the game, her grave features the same quote.
Image Source: Getty/ Emma McIntyre