en_tn/ecc/05/13.md

riches hoarded by the owner

AT: "an owner hoards riches" (See: rc://en/ta/man/translate/figs-activepassive)

through bad luck

Possible meanings are 1) "through misfortune" or 2) "through a bad business deal."

his own son...is left with nothing in his hands

Here the phrase "in his hands" refers to ownership. AT: "he leaves no possession for his own son" (See: rc://en/ta/man/translate/figs-activepassive and rc://en/ta/man/translate/figs-idiom)