1 Corinthians 7:12-13, 15

For all the others I say this (I am saying this, not the Lord): If a Christian man has a wife who is not a believer, and she is happy to live with him, he must not divorce her. And if a Christian woman has a husband who is not a believer, and he is happy to live with her, she must not divorce him.

But if those who are not believers decide to leave, let them leave. When this happens, the Christian man or woman is free. But God called us to live in peace.