1 Corinthians 7:10-12

10 and to the married I announce — not I, but the Lord — let not a wife separate from a husband:

11 but and if she may separate, let her remain unmarried, or to the husband let her be reconciled, and let not a husband send away a wife.

12 And to the rest I speak — not the Lord — if any brother hath a wife unbelieving, and she is pleased to dwell with him, let him not send her away;