8 To the unmarried and widows I say that it is best for them to remain as I am. 9 But if they do not have self-control, let them get married. For it is better to marry than to burn with sexual desire. 10 To the married I give this command—not I, but the Lord—a wife should not divorce a husband 11 (but if she does, let her remain unmarried, or be reconciled to her husband), and a husband should not divorce his wife. 12 To the rest I say—I, not the Lord—if a brother has a wife who is not a believer and she is happy to live with him, he should not divorce her. 13 And if a woman has a husband who is not a believer and he is happy to live with her, she should not divorce him. 14 For the unbelieving husband is sanctified because of the wife, and the unbelieving wife because of her husband. Otherwise your children are unclean, but now they are holy. 15 But if the unbeliever wants a divorce, let it take place. In these circumstances the brother or sister is not bound. God has called you in peace. 16 For how do you know, wife, whether you will bring your husband to salvation? Or how do you know, husband, whether you will bring your wife to salvation?
With regard to one who vows that his wife may not derive benefit from marital relations with him, Beit Shammai say: He may maintain this situation for up to two weeks, but beyond that he must divorce her and give her the payment for her marriage contract. Beit Hillel say: He must divorce her if it continues beyond one week. Apropos the husband’s obligation to his wife regarding marital relations, the Gemara mentions other aspects of this issue: Students may leave their homes and travel in order to learn Torah without their wives’ permission for up to thirty days, and laborers may leave their homes without their wives’ permission for up to one week. The set interval defining the frequency of a husband’s conjugal obligation to his wife stated in the Torah (see Exodus 21:10), unless the couple stipulated otherwise, varies according to the man’s occupation and proximity to his home: Men of leisure, who do not work, must engage in marital relations every day, laborers must do so twice a week, donkey drivers once a week, camel drivers once every thirty days, and sailors once every six months. This is the statement of Rabbi Eliezer.