Romans 15:9

and that the Gentiles might glorify God for his mercy [In order that he might vindicate the veracity of God in confirming and in keeping the promises of the covenant given unto the fathers, Abraham, Isaac and Jacob: (now these covenant promises contained blessings for the Gentiles-- Genesis 22:18; these blessings thus coming to them through the circumcision people and covenant-- John 4:22; therefore Christ became the minister of the circumcision for the sake of the Gentiles also, that the Gentiles might also be received) and that they might glorify God for his mercy. If Christ, then, the Lord and Master, was a minister (Matthew 20:27-28) unto each for purposes of unity and concord (Ephesians 2:11-22), with what lowly humility should his servants receive and serve each other to effect these results]; as it is written, Therefore will I give praise unto thee among the Gentiles, And sing unto thy name. ["Sing" (psalloo) means, literally, "strike the harp to thy name." This quotation argues that the use of that instrument, as a means of divine praise, is innocent and permissible.]