Is expiation (kaffara) obligatory for someone who said to his wife: "Divorce be upon me if you go to your family's house unless I give you permission and command you," and then he said to her, "Go," with the intention of threatening her?

If you made an exception in your oath regarding your wife going to her family's house with your permission, then no divorce occurs, and no expiation for an oath is due if she goes with your permission. We emphasize the importance of being cautious with divorce pronouncements when resolving marital problems.