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 14:20

14:20 Brothers and sisters, do not be children in your thinking. Instead, be infants in evil, but in your thinking be mature.