1 Corinthians 6:12-7:11
‘All things are lawful for me’, but not all things are beneficial. ‘All things are lawful for me’, but I will not be dominated by anything. ‘Food is meant for the stomach and the stomach for food’, and God will destroy both one and the other. The body is meant not for fornication but for the Lord, and the Lord for the body. And God raised the Lord and will also raise us by his power. Do you not know that your bodies are members of Christ? Should I therefore take the members of Christ and make them members of a prostitute? Never! Do you not know that whoever is united to a prostitute becomes one body with her? For it is said, ‘The two shall be one flesh.’ But anyone united to the Lord becomes one spirit with him. Shun fornication! Every sin that a person commits is outside the body; but the fornicator sins against the body itself. Or do you not know that your body is a temple of the Holy Spirit within you, which you have from God, and that you are not your own? For you were bought with a price; therefore glorify God in your body.
Now concerning the matters about which you wrote: ‘It is well for a man not to touch a woman.’ But because of cases of sexual 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 have authority over her own body, but the husband does; likewise the husband does not have authority over his own body, but the wife does. Do not deprive one another except perhaps by agreement for a set time, to devote yourselves to prayer, and then come together again, so that Satan may not tempt you because of your lack of self-control. This I say by way of concession, not of command. I wish that all were as I myself am. But each has a particular gift from God, one having one kind and another a different kind.
To the unmarried and the widows I say that it is well for them to remain unmarried as I am. But if they are not practising self-control, they should marry. For it is better to marry than to be aflame with passion.
To the married I give this command—not I but the Lord—that the wife should not separate from her husband (but if she does separate, let her remain unmarried or else be reconciled to her husband), and that the husband should not divorce his wife.
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Matthew 19:3-12
Some Pharisees came to him, and to test him they asked, ‘Is it lawful for a man to divorce his wife for any cause?’ He answered, ‘Have you not read that the one who made them at the beginning “made them male and female”, and said, “For this reason a man shall leave his father and mother and be joined to his wife, and the two shall become one flesh”? So they are no longer two, but one flesh. Therefore what God has joined together, let no one separate.’ They said to him, ‘Why then did Moses command us to give a certificate of dismissal and to divorce her?’ He said to them, ‘It was because you were so hard-hearted that Moses allowed you to divorce your wives, but at the beginning it was not so. And I say to you, whoever divorces his wife, except for unchastity, and marries another commits adultery.’
His disciples said to him, ‘If such is the case of a man with his wife, it is better not to marry.’ But he said to them, ‘Not everyone can accept this teaching, but only those to whom it is given. For there are eunuchs who have been so from birth, and there are eunuchs who have been made eunuchs by others, and there are eunuchs who have made themselves eunuchs for the sake of the kingdom of heaven. Let anyone accept this who can.’