1 Corinthians 7:13

“And the woman which hath an husband that believeth, etc.] The apostle puts the case both ways, there being the same reason for one as for another; that if she that was a sister, who was partaker of the grace of God, and a member of the church, had a husband to whom she was married before her conversion; who was an unbeliever, had no faith in Christ, nor any notion of the Gospel, but an infidel to both: and if he be pleased to dwell with her; loves her, and is willing to continue with her; neither puts her away from him, nor departs from her on account of her Christianity: let her not leave him; but continue, and cohabit with him as man and wife; this is the advice the apostle gives, as…”

“the woman--a believer. let her not leave him--"her husband," instead of "him," is the reading of the oldest manuscripts The Greek for "leave" is the same as in Co1 7:12, "put away"; translate, "Let her not put away [that is, part with] her husband." The wife had the power of effecting a divorce by Greek and Roman law.”

“Let her not leave him - A change of phraseology from the last verse, to suit the circumstances. The wife did not have power to “put away” the husband, and expel him from his own home; but she might think it her duty to be separated from him. The apostle counsels her not to do this; and this advice should still be followed. She should still love her husband and seek his welfare; she should be still a kind, affectionate, and faithful wife; and all the more so that she may show him the excellence of religion, and win him to love it. She should even bear much, and bear it long; nor should she leave him unless her life is rendered miserable, or in danger; or unless he wholly neglects to make…”