1 Corinthians 7:25

Now concerning virgins — Of either sex. I have no commandment from the Lord — By a particular revelation. Nor was it necessary he should; for the apostles wrote nothing which was not divinely inspired: but with this difference, — sometimes they had a particular revelation, and a special commandment; at other times they wrote from the divine light which abode with them, the standing treasure of the Spirit of God. And this, also, was not their private opinion, but a divine rule of faith and practice. As one whom God hath made faithful in my apostolic office; who therefore faithfully deliver what I receive from him.