The Republic by Plato Part 3 Page 106

Gold and silver we will tell them that they have from God; the diviner metal is within them, and they have therefore no need of the dross which is current among men, and ought not to pollute the divine by any such earthly admixture; for that commoner metal has been the source of many unholy deeds, but their own is undefiled.

And they alone of all the citizens may not touch or handle silver or gold, or be under the same roof with them, or wear them, or drink from them. And this will be their salvation, and they will be the saviours of the State. But should they ever acquire homes or lands or moneys of their own, they will become housekeepers and husbandmen instead of guardians, enemies and tyrants instead of allies of the other citizens; hating and being hated, plotting and being plotted against, they will pass their whole