משנה אויף אסתר 8:15

[The following regions are regarded as] three countries in respect of marriage: Judaea, Transjordan and Galilee. [A husband] may not take out [his wife with him] from one town to another or from one city to an other. But within the same country he may take her out with him from one town into another town or from one city into an other city, but not from a town to a city nor from a city to a town. [A man] may take out [his wife with him] from an inferior to a superior dwelling, but not from a superior to an inferior dwelling. Rabban Shimon ben Gamaliel says: not even from an inferior dwelling to a superior dwelling, because the [change to a] superior dwelling tests.