[What Is the Ruling on a Man Saying: “It Is Your Divorce”]

The answer—and Allah is the One who grants success: What appears to me from the construction of this statement is that no divorce falls upon the woman by her doing the act mentioned in the condition. The clarification is: the husband has made the act mentioned in the condition the divorce itself, whereas the act itself is neither an explicit formula of divorce nor a euphemism for it.
So if a man said to his wife, “Your divorce is your entering the house,” or “Your entering the house is your divorce,” that would not be a divorce. Divorce has known expressions—some explicit and some euphemistic.
Source : Min Thimār al-ʿIlm wa al-Ḥikmah vol.1