In video games and movies, an easter egg is a message/feature/etc that’s hidden in the main work for geeks to find. Game developers hide their names in the game, things from one franchise mysteriously appear in another, and private jokes hide in the most inaccessible places in the virtual world. There’s at least one easter egg in the Bible.
If there was only one verse like this, it could be merely an interesting coincidence. They’re in poems and prophecies, which make heavy use of rhetoric and symbolism. But at least 17 places in the Bible mention it, so they’re clearly not a coincidence. Here are a few of them: