The reading is from St. Paul's First Letter to the Corinthians 6:20; 7:1-12

Brethren, glorify God in your body and in your spirit which are from God. Now concerning the matters about which you wrote. It is well for a man not to touch a woman. But because of the temptation to immorality, each man should have his own wife and each woman her own husband. The husband should give to his wife her conjugal rights, and likewise the wife to her husband. For the wife does not rule over her own body, but the husband does; likewise the husband does not rule over his own body, but the wife does. Do not refuse one another except perhaps by agreement for a season, that you may devote yourselves to prayer; but then come together again, lest Satan tempt you through lack of self-control. I say this by way of concession, not of command. I wish that all were as I myself am. But each has his own special gift from God, one of one kind and one of another. To the unmarried and the widows I say that it is well for them to remain single as I do. But if they cannot excercise self-control, they should marry. For it is better to marry than to be aflame with passion. To the married I give charge, not I but the Lord, that the wife should not separate from her husband (but if she does, let her remain single or else be reconciled to her husband) - and that the husband should not divorce the wife. To the rest I say, not the Lord, that if any brother has a wife who is an unbeliever, and she consents to live with him, he should not divorce her.