Lk 2:28-32, Lk 24:46-47, Acts 13:47-49
In the Old Testament, God spoke of bringing salvation to both the Israelites and the Gentiles. (Isa 49:5-7)
Isa 49:5 And now, saith the Lord that formed me from the womb to be his servant, to bring Jacob again to him, Though Israel be not gathered, yet shall I be glorious in the eyes of the Lord, and my God shall be my strength. 6 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. 7 Thus saith the Lord, the Redeemer of Israel, and his Holy One, to him whom man despiseth, to him whom the nation abhorreth, to a servant of rulers, Kings shall see and arise, princes also shall worship, because of the Lord that is faithful, and the Holy One of Israel, and he shall choose thee.
Simeon held the baby Jesus and confessed that this Jesus would save both Israel and the Gentiles. (Luke 2:28-32)
Luke 2:28 Then took he him up in his arms, and blessed God, and said, 29 Lord, now lettest thou thy servant depart in peace, according to thy word: 30 For mine eyes have seen thy salvation, 31 Which thou hast prepared before the face of all people; 32 A light to lighten the Gentiles, and the glory of thy people Israel.
It will be preached to all nations, beginning in Jerusalem, that Jesus died and rose again the third day for the forgiveness of our sins. (Luke 24:46-47)
Luke 24:46 And said unto them, Thus it is written, and thus it behooved Christ to suffer, and to rise from the dead the third day: 47 And that repentance and remission of sins should be preached in his name among all nations, beginning at Jerusalem.
The resurrected Christ Jesus commanded us to preach the gospel to all Gentiles to the ends of the earth. (Acts 13:47-49)
Acts 13:47 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. 49 And the word of the Lord was published throughout all the region.