1 Corinthians 7:6-9

But I am saying this as a concession, not as a command. I wish that all the people were as I am; but each person has his own gift from God, one of this kind and one of that. But I say to the unmarried and to the widows, [that as a practical matter] it is good if they remain [single and entirely devoted to the Lord] as I am. But if they do not have [sufficient] self-control, they should marry; for it is better to marry than to burn with passion.