Isa 49:6, Isa 42:6, Isa 56:8, Isa 52:13-15, Mic 4:2, Zech 8:23, Mt 8:11, Jn 11:51-52, Jn 17:20, Act 10:45, Acts 11:18, Acts 13:46
In the Old Testament it was foretold that Christ would save the Gentiles. (Isa 49:6, Isa 42:6, Isa 56:8, Isa 52:13-15, Mic 4:2, Zech 8:23)
Isa 49:6 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.
Isa 42:6 I the Lord have called thee in righteousness, and will hold thine hand, and will keep thee, and give thee for a covenant of the people, for a light of the Gentiles;
Isa 56:8 The Lord God, which gathereth the outcasts of Israel saith, Yet will I gather others to him, beside those that are gathered unto him.
Isa 52:13 Behold, my servant shall deal prudently, he shall be exalted and extolled, and be very high. 14 As many were astonied at thee; his visage was so marred more than any man, and his form more than the sons of men: 15 So shall he sprinkle many nations; the kings shall shut their mouths at him: for that which had not been told them shall they see; and that which they had not heard shall they consider.
Mic 4:2 And many nations shall come, and say, Come, and let us go up to the mountain of the Lord, and to the house of the God of Jacob; and he will teach us of his ways, and we will walk in his paths: for the law shall go forth of Zion, and the word of the Lord from Jerusalem.
Zech 8:23 Thus saith the Lord of hosts; In those days it shall come to pass, that ten men shall take hold out of all languages of the nations, even shall take hold of the skirt of him that is a Jew, saying, We will go with you: for we have heard that God is with you.
Jesus came to this earth to save the Gentiles as well. (Jn 10:16, Mt 8:11)
Jn 10:16 And other sheep I have, which are not of this fold: them also I must bring, and they shall hear my voice; and there shall be one fold, and one shepherd.
Mt 8:11 And I say unto you, That many shall come from the east and west, and shall sit down with Abraham, and Isaac, and Jacob, in the kingdom of heaven.
Jesus died to save the Gentiles as well. (Jn 11:51-52)
Jn 11:51 And this spake he not of himself: but being high priest that year, he prophesied that Jesus should die for that nation; 52 And not for that nation only, but that also he should gather together in one the children of God that were scattered abroad.
Jesus entrusted us with the work of salvation for the Gentiles. (Jn 17:20)
Jn 17:20 Neither pray I for these alone, but for them also which shall believe on me through their word;
The gospel is being preached to the Gentiles. (Act 10:45, Acts 11:18)
Act 10:45 And they of the circumcision which believed were astonished, as many as came with Peter, because that on the Gentiles also was poured out the gift of the Holy Ghost.
Acts 11:18 When they heard these things, they held their peace, and glorified God, saying, Then hath God also to the Gentiles granted repentance unto life.
Also, since the Jews did not receive the gospel that Jesus is the Christ, the gospel is now directed to the Gentiles. (Acts 13:46)
Acts 13:46 Then Paul and Barnabas waxed bold, and said, It was necessary that the word of God should first have been spoken to you: but seeing ye put it from you, and judge yourselves unworthy of everlasting life, lo, we turn to the Gentiles.