What does the Bible say about the covenant of promise?

The covenant of promise, as described in Scripture, is synonymous with the covenant of grace. It is not based on works or law but is an everlasting commitment made by the Godhead—Father, Son, and Holy Spirit—before the foundation of the world concerning the salvation of God's chosen people. As Paul explains in Galatians 3:15-26, this covenant ensures that salvation is guaranteed through the person and work of Jesus Christ, confirming the unchanging nature of God's promises across time.