Romans 15:9-12

9and, moreover, that the Gentiles might glorify God for his mercy. As it is written: “Therefore I will praise you among the Gentiles; I will sing the praises of your name.” 2 Samuel 22:50; Psalm 18:49

10Again, it says, “Rejoice, you Gentiles, with his people.” Deut. 32:43

11And again, “Praise the Lord, all you Gentiles; let all the peoples extol him.” Psalm 117:1

12And again, Isaiah says, “The Root of Jesse will spring up, one who will arise to rule over the nations; in him the Gentiles will hope.” Isaiah 11:10 (see Septuagint)