Apostol § 137

Brethren, if any brother has a wife who does not believe, and she is pleased to live with him, let him not divorce her… And a woman who has a husband who does not believe, and if he is pleased to live 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; otherwise your children would be unclean, but now they are holy. But if the unbeliever departs, let him depart; a brother or a sister is not under bondage in such cases. But God has called us to peace. For how do you know, O wife, whether you shall save your husband? Or how do you know, O husband, whether you shall save your wife? But as God has distributed to every man, as the Lord has called every one, so let him walk. And so I ordain in all the Churches. Was anyone called while circumcised? Let him not become uncircumcised. Was anyone called while uncircumcised? Let him not be circumcised. For neither circumcision counts for anything nor uncircumcision, but keeping the commandments of God is what matters. Let every man abide in the same calling wherein he was called. Were you called while a slave? Do not be concerned about it; but if you can be made free, rather use it. For he who is called in the Lord while a servant is the Lord's freeman. Likewise he who is called while free is the servant of Christ. You were bought with a price; do not become servants of men… Brethren, let every man abide with God in that calling in which he was called…