What does the Bible say about the relationship between Jews and Gentiles in salvation?

In Romans 10, the Apostle Paul emphasizes that salvation is for everyone, regardless of their ethnic background. He highlights the unity of believers in Christ, stating, 'there is no difference between the Jew and the Greek, for the same Lord over all is rich unto all that call upon Him' (Romans 10:12). This reflects the overarching truth that God's grace is extended beyond the nation of Israel to all nations and peoples, which is a central tenet of the New Testament's teaching on salvation.