ישעיהו נה:ד פירוש: רש״י ואבן עזרא

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.)

Behold, I have given him, namely, Messiah.

לאמים The people, the ל being radical; or to the people, the ל being a preposition.⁹There are in Hebrew two words which signify nation, namely: אֹם and לאֹם; pl. אֻמִּים (Ps. 117:1) and לאֻמִּים (49:1). For a witness. Messiah will testify, that there is no other king, no other ruler of the world, than God.