Now concerning virgins I have no commandment of the Lord: yet I give my judgment, as one that has obtained mercy of the Lord to be faithful.
All Commentaries on 1 Corinthians 7:25 Go To 1 Corinthians 7
Severian of Gabala
AD 425
It is clear that Paul says this not because he has no command to teach about virginity but because God has not told him that these people should practice chastity themselves. That is why he writes to them giving his opinion and recommending chastity, without imposing it on them. .