1st Corinthians 7:11

8 And I say to the unmarried and to the widows: it is good for them if they may remain even as I [am];

9 and if they have not continence -- let them marry, for it is better to marry than to burn;

10 and to the married I announce -- not I, but the Lord -- let not a wife separate from a husband:

11 but and if she may separate, let her remain unmarried, or to the husband let her be reconciled, and let not a husband send away a wife.

12 And to the rest I speak -- not the Lord -- if any brother hath a wife unbelieving, and she is pleased to dwell with him, let him not send her away;

13 and a woman who hath a husband unbelieving, and he is pleased to dwell with her, let her not send him away;

14 for the unbelieving husband hath been sanctified in the wife, and the unbelieving wife hath been sanctified in the husband; otherwise your children are unclean, but now they are holy.