Romans 15:8-9

For I tell you that Christ has become a servant and a minister to the circumcision (Jews) on behalf of God’s truth, to confirm and verify the promises made to the fathers, and for the Gentiles to glorify God for His mercy [to them, since God had no covenant with them]. As it is written and forever remains written, “THEREFORE I PRAISE YOU AMONG THE GENTILES, AND SING PRAISES TO YOUR NAME.” [Ps 18:49]