en_tn/job/16/18.md

Earth do not cover up my blood

Job talks to the ground as if it could help him keep the evidence of his being treated so badly. AT: "I want it to be known that I died unfairly;" (See: rc://en/ta/man/translate/figs-personification)

let my cry have no resting place

This expression means, "Let my appeal be very clear to everyone and always be heard". (See: rc://en/ta/man/translate/figs-litotes)

my witness is in heaven

Job trusts that someone will speak up for him to God.

vouches

This means "to verify by supplying proof".