1 Corinthians 7:14-16

Darby Translation

¹⁴ For the unbelieving husband is sanctified in the wife, and the unbelieving wife is sanctified in the brother; since [otherwise] indeed your children are unclean, but now they are holy.

¹⁵ But if the unbeliever go away, let them go away; a brother or a sister is not bound in such [cases], but God has called us in peace.

¹⁶ For what knowest thou, O wife, if thou shalt save thy husband? or what knowest thou, O husband, if thou shalt save thy wife?