Ephesians 3:3-6

Amplified Bible

³ and that by [divine] revelation the mystery was made known to me, as I have already written in brief.^{(A) 4} By referring to this, when you read it you can understand my insight into the mystery of Christ, ⁵ which in other generations was not disclosed to mankind, as it has now been revealed to His holy apostles and prophets by the [Holy] Spirit; ⁶ [it is this:] that the Gentiles are now joint heirs [with the Jews] and members of the same body, and joint partakers [sharing] in the [same divine] promise in Christ Jesus through [their faith in] the good news [of salvation].