1 Corinthians 7:9 (KJV)

The wife hath not power of her own body, but the husband: and likewise also the husband hath not power of his own body, but the wife.

Defraud ye not one the other, except it be with consent for a time, that ye may give yourselves to fasting and prayer; and come together again, that Satan tempt you not for your incontinency.

But I speak this by permission, and not of commandment.

For I would that all men were even as I myself. But every man hath his proper gift of God, one after this manner, and another after that.

I say therefore to the unmarried and widows, It is good for them if they abide even as I.

And unto the married I command, yet not I, but the Lord, Let not the wife depart from her husband:

But and if she depart, let her remain unmarried or be reconciled to her husband: and let not the husband put away his wife.

But to the rest speak I, not the Lord: If any brother hath a wife that believeth not, and she be pleased to dwell with him, let him not put her away.

And the woman which hath an husband that believeth not, and if he be pleased to dwell with her, let her not leave him.

For the unbelieving husband is sanctified by the wife, and the unbelieving wife is sanctified by the husband: else were your children unclean; but now are they holy.