Rabbi Shmuel Salant, Chief Rabbi of Jerusalem (1816-1909)

Rabbi Shmuel Salant quotes the law that a wife may force her husband to move to Eretz Yisroel (Kesubos 110b), and then asks why – even according to the Ramban, he says, there is no obligation on every Jew to move to Eretz Yisroel, since this is one of the Three Oaths. He therefore explains that she can only force him to move if she is willing to move even without him. In that case, if he refuses to come along, he is not fulfilling his marital obligations to her, and he must divorce her. But if she wants to move only with him, then he has no obligation to move. In other words, the reason why he must divorce her if she is willing to move to Eretz Yisroel is not because his refusal to move to Eretz Yisroel is considered neglecting his obligations as a Jew. It is only because once she moves, he would be neglecting his obligations as a husband. (Printed in Tzefunos, year 3 issue 1, p. 46)