1 Corinthians 7:10-12
Modern English Version
10 Now to the married I command, not I, but the Lord, do not let the wife depart from her husband. 11 But if she departs, let her remain unmarried or be reconciled to her husband. And do not let the husband divorce his wife.
12 To the rest I speak, not the Lord: If any brother has an unbelieving wife who consents to live with him, he should not divorce her.Read full chapter