Ephesians 3:1–6 (ESV)
[1] For this reason I, Paul, a prisoner of Christ Jesus on behalf of you Gentiles—[2] assuming that you have heard of the stewardship of God’s grace that was given to me for you, [3] how the mystery was made known to me by revelation, as I have written briefly. [4] When you read this, you can perceive my insight into the mystery of Christ, [5] which was not made known to the sons of men in other generations as it has now been revealed to his holy apostles and prophets by the Spirit. [6] This mystery is that the Gentiles are fellow heirs, members of the same body, and partakers of the promise in Christ Jesus through the gospel.