With his very own mouth

With his own mouth. With his own hands (במו figuratively means “with…”; literally, “in…”).

("I called upon my servant, and he will not answer with his own mouth to plead with him" – Job 19:16; also: "I saddle the fabric with your own hands / for me as a memento a drop of blood" – Leah Goldberg, Farewell; also: "This is the command of pride: with my own hands… / the cord snapped, the bridge burned / with my own hands" – Rachel, This Is the Command of Pride; also: "Something like this with my own eyes / your presence is fire in my bones" – Shalom Hanoch, Slowly)

Translation