The Messiah would be a light to the Gentiles.
OT Prophecy NT Fulfillment
Isaiah 49:6b
"And he said, It is a light thing that thou shouldest be my servant to raise up the tribes of Jacob, and to restore the preserved of Israel: I will also give thee for a light to the Gentiles, that thou mayest be my salvation unto the end of the earth."
Acts 13:47–48
[47] For so hath the Lord commanded us, saying, I have set thee to be a light of the Gentiles, that thou shouldest be for salvation unto the ends of the earth.
[48] And when the Gentiles heard this, they were glad, and glorified the word of the Lord: and as many as were ordained to eternal life believed.
Tanakh – Neviim – Isaiah 49:6b
"Yea, He saith: 'It is too light a thing that thou shouldest be My servant to raise up the tribes of Jacob, and to restore the offspring of Israel; I will also give thee for a light of the nations, that My salvation may be unto the end of the earth.'"
Hebrew OT – Isaiah 49:6b
[49:6] וַיֹּאמֶר נָקֵל מִהְיוֹתְךָ לִי עֶבֶד
לְהָקִים אֶת־שִׁבְטֵי יַעֲקֹב
וּנְצוּרֵי יִשְׂרָאֵל לְהָשִׁיב
וּנְתַתִּיךָ לְאוֹר גּוֹיִם
לִהְיוֹת יְשׁוּעָתִי עַד־קְצֵה הָאָרֶץ