What does the Bible say about circumcision and salvation?

In Acts 15, the apostles concluded that salvation is based solely on the grace of Jesus Christ and not on any works of the law, including circumcision. The early church faced contention regarding whether Gentiles should be required to observe Jewish laws, but they affirmed that salvation comes through faith in Christ alone (Acts 15:11). This teaching reinforces the sovereignty of grace, as it emphasizes that Christ's sacrifice is sufficient for salvation, negating the need for adherence to the law for salvation.