en_tn/luk/22/71.md

Why do we still need a witness?

They use a question for emphasis. AT: "We have no further need for witnesses!" (See: rc://en/ta/man/translate/figs-rquestion)

heard from his own mouth

The phrase "his own mouth" refers to his speech. AT: "heard him say that he believes he is the Son of God" (See: rc://en/ta/man/translate/figs-metonymy)