Rom 15

7 ¶Wherefore receive ye one another, as Christ also received us to the glory of God.
8 Now I say that Jesus Christ was a minister of the circumcision for the truth of God, to confirm the promises made unto the fathers:
9 And that the Gentiles might glorify God for his mercy; as it is written, For this cause I will confess to thee among the Gentiles, and sing unto thy name.
10 And again he saith, Rejoice, ye Gentiles, with his people.
11 And again, Praise the Lord, all ye Gentiles; and laud him, all ye people.
12 And again, Esaias saith, There shall be a root of Jesse, and he that shall rise to reign over the Gentiles; in him shall the Gentiles trust.

Ephesians 3

6  That the Gentiles should be fellowheirs, and of the same body, and partakers of his promise in Christ by the gospel:
7  Whereof I was made a minister, according to the gift of the grace of God given unto me by the effectual working of his power.
8  Unto me, who am less than the least of all saints, is this grace given, that I should preach among the Gentiles the unsearchable riches of Christ;
9  And to make all men see what is the fellowship of the mystery, which from the beginning of the world hath been hid in God, who created all things by Jesus Christ:
10  To the intent that now unto the principalities and powers in heavenly places might be known by the church the manifold wisdom of God,
11  According to the eternal purpose which he purposed in Christ Jesus our Lord: 12  In whom we have boldness and access with confidence by the faith of him.