Rashi, on Isa 55:4

“Behold I have given him for a witness to the people, for a leader and a master to the Gentiles.”

“a witness to nations A prince and a superior over them, and one who will reprove and testify of their ways to their faces. ([Mss., however, read:] One who reproaches them for their ways to their faces.)”

Imported from an open dataset — not yet checked against the printed edition.