1 Corinthians 7:10-14

MNT(i) 10 But to those already married my commandment is—and not mine, but the Lord's—that a wife is not to leave her husband; 11 (or if she has already left him let her either remain as she is, or be reconciled to him), and also that a husband is not to put away his wife. 12 To the rest it is I who am speaking, not the Lord. If any brother has a wife who is not a believer, if he is willing to live with her, let him not send her away. 13 And a woman whose husband is not a believer, if he is willing to live with her, let her not separate from him. 14 For the unbelieving husband is consecrated through union with his believing wife; and the unbelieving wife, through union with her believing husband. Otherwise your children would be unholy, but now they are consecrated to God.