Ephesians 3:3-5

Young's Literal Translation

³ that by revelation He made known to me the secret, according as I wrote before in few [words] --

⁴ in regard to which ye are able, reading [it], to understand my knowledge in the secret of the Christ,

⁵ which in other generations was not made known to the sons of men, as it was now revealed to His holy apostles and prophets in the Spirit --