en_tn_condensed/psa/035/015.md

gathered together

"assembled together" or "came together"

against me

This means they came together for the purpose of attacking the writer. AT: "to make plans against me" or "to plan my destruction" (See: rc://en/ta/man/translate/figs-idiom)

They tore at me

Here the treated the writer as if he were a piece of cloth that they could tear to pieces. AT: "They attacked me" (See: rc://en/ta/man/translate/figs-metaphor)

With no respect at all they mocked me

"With the worthless people they ridiculed me" or 2) "Without respect they made fun of me"

they gnashed at me with their teeth

This is a sign of anger and hate. "they made grinding noises with their teeth at me" (See: rc://en/ta/man/translate/translate-symaction)