Parents父母

The element that produces the palace element.

Rule
生我者為父母
父母

一切庇護我身者是也。

Everything that shelters me.

Zeng Shan Bu Yi

What it stands for

The book sums this line up as whatever shelters you. So it covers parents, elders and teachers, and then, by the same logic, houses, walls, boats, carts, clothes and rain gear. Documents and letters belong here too.

The rule above is a later summary. The book itself lists each palace’s lines one by one.

Sources Zeng Shan Bu Yi, chapter 8, from an online transcription, not yet checked against a printed edition. The plain text is ours.