Where does "I don't want to talk about water, don't ask about divination" come from? What do you mean?

These two sentences are terms in divination, which can be found in many divination books and almanac, so it is impossible to determine where they come from.

Ren: Tiangan ranked ninth. Table date.

Pumping: entering, approaching and fetching water. Everything related to water is called drowning.

Son: the earth branch is in front, which means time.

Q: Divination.

It means: Never do anything related to water. Never ask divination when you are a child.