To the married I give this command (not I, but the Lord): A wife must not separate from her husband.
10. To the married I command. He now treats of another condition of marriage — its being an indissoluble tie. Accordingly, he condemns all those divorces that were of daily occurrence among the heathens, and were not punished among the Jews by the law of Moses. Let not, says he, the husband put away his wife, and let not the wife depart from her husband. Why?
In this paragraph the apostle gives them direction in a case which must be very frequent in that age of the world, especially among the Jewish converts; I mean whether they were to live with heathen relatives in a married state. Moses's law permitted divorce; and there was a famous instance in the Jewish state, when the people were obliged to put away their idolatrous wives, Ezr 10:3.
Commenting on 1 Corinthians 7:10-16
And unto the married I command,.... To the unmarried and widows he spoke by permission, or only gave advice and counsel to remain unmarried, provided they could contain; but if not, it was advisable to marry; but to persons already in a married state, what he has to say to them is by commandment, enjoining what they are under obligation to observe, not being at...