1 Corinthians 7:11

7:11 (but if she does, let her remain unmarried, or be reconciled to her husband), and a husband should not divorce his wife.

1 Corinthians 7:14

7:14 For the unbelieving husband is sanctified because of the wife, and the unbelieving wife because of her husband. Otherwise your children are unclean, but now they are holy.

1 Corinthians 7:16

7:16 For how do you know, wife, whether you will bring your husband to salvation? Or how do you know, husband, whether you will bring your wife to salvation?