1 Corinthians 7:14

14Is sanctifiedἡγίασταιforγὰρtheὁhusbandἀνὴρὁunbelievingἄπιστοςinἐνtheτῇwifeγυναικί,andκαὶis sanctifiedἡγίασταιtheἡwifeγυνὴἡunbelievingἄπιστοςinἐνtheτῷhusbandἀδελφῷ·elseἐπεὶthenἄραtheτὰchildrenτέκναof youὑμῶνuncleanἀκάθαρτάareἐστιν,nowνῦνhoweverδὲholyἅγιάthey areἐστιν.

For the unbelieving husband is sanctified in the wife, and the unbelieving wife is sanctified in the brother. Otherwise, then your⁺ children are unclean; but now they are holy.