Cross reference
Exodus 21:10
10 If he take him another `wife'; her food, her raiment, and her duty of marriage, shall he not diminish.
1 Corinthians 7:1-6
1 Now concerning the things whereof ye wrote: It is good for a man not to touch a woman.
2 But, because of fornications, let each man have his own wife, and let each woman have her own husband.
3 Let the husband render unto the wife her due: and likewise also the wife unto the husband.
4 The wife hath not power over her own body, but the husband: and likewise also the husband hath not power over his own body, but the wife.
5 Defraud ye not one the other, except it be by consent for a season, that ye may give yourselves unto prayer, and may be together again, that Satan tempt you not because of your incontinency.
6 But this I say by way of concession, not of commandment.