1 Corinthians 7:13-15

New Catholic Bible

¹³ And if any woman has a husband who is an unbeliever, and he is willing to remain with her, she should not divorce him. ¹⁴ For the unbelieving husband is made holy through his wife, and the unbelieving wife is made holy through her husband. Otherwise, your children would be unclean, whereas in fact they are holy.

¹⁵ However, if the unbelieving partner chooses to separate, let that person go. The brother or sister is no longer bound in this case. God has called you to live in peace.