1 Corinthians 7:8-12

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

But if they cannot contain, let them marry: for it is better to marry than to burn.

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.