הָיָה לוֹ לְפֶה

ביטוי (אנגלית)

To speak on someone's behalf/ speak in the name of/ to be spokesman (mouthpiece)

הגדרה (אנגלית)

Spoke in his place. Served as his spokesman. Argued his points on his behalf.

("And he shall speak to you to the people, and he shall be to you a mouth, and you shall be to him a God" - Exodus 4:16 (God to Moses), and so: "Among all the inhabitants of Be'at/ Who has not been to you a mouth" - Nathan Alterman/ Poems on the Land of the Negev)