1 Corinthians 7:14-16

The husband who is not a believer is made holy through his believing wife. And the wife who is not a believer is made holy through her believing husband. If this were not true, your children would not be clean, but now your children are holy. 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. Wife, you don’t know; maybe you will save your husband. And husband, you don’t know; maybe you will save your wife.