[There are] three lands as far as marriage is concerned: Judea, the other side of the Jordan, and Galilee. They cannot remove from town to town or from city to city. In the same land, however, they may remove from town to town or from city to city, but not from a town to a city or from a city to a town. They may remove from a bad dwelling to a good dwelling, but not from a good dwelling to a bad dwelling. Rabban Shimon ben Gamliel says: Not even from a bad dwelling to a good dwelling, for the good dwelling puts to the proof.