1 Corinthians 7:15 (KJV)

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.

For what knowest thou, O wife, whether thou shalt save thy husband? or how knowest thou, O man, whether thou shalt save thy wife?

But as God hath distributed to every man, as the Lord hath called every one, so let him walk. And so ordain I in all churches.

Is any man called being circumcised? let him not become uncircumcised. Is any called in uncircumcision? let him not be circumcised.

Circumcision is nothing, and uncircumcision is nothing, but the keeping of the commandments of God.

Let every man abide in the same calling wherein he was called.