The practice of having a slip that read “Five leaves left” was where Nick Drake got the title for his first album (somewhat eerily recorded five years before his death).
https://www.alimentation.cc/product/tuck-box/
Not sure what any of this means.
Edit: just noticed that I responded to your post five hours after you posted it.
> In the Erisian Archives is an old memo from Omar to Mal-2: "I find the Law of Fives to be more and more manifest the harder I look."
https://penelope.uchicago.edu/misctracts/plutarchE.html
There's speculation that this was derived from an earlier Erisian mystery cult, but how it ended up in a temple of Apollo I'm sure I don't know.