en_tn_condensed/psa/109/017.md

may it come back upon him

"may his curses come upon him"

He clothed himself...into his bones

David uses these images to emphasize that curses filled every part of the man, even the innermost part of him. AT: "Curses became part of who he was and all he could do was curse other people." (See:5. Clothing is Moral Quality and 6. A Liquid is a Moral Quality in en:ta:workbench:translate:biblicalimagery )

as his garment

"as if they were his clothing."

came into his inner being

"entered into his body"

like oil into his bones

AT: "curses went into his bones like oil goes into bones." The bones are the innermost part of a person. (See: rc://en/ta/man/translate/figs-ellipsis)