The Command to Settle Israel
“In Jewish law, one who rents a house outside Israel is obliged to affix a mezuzah only after thirty days. Until then it is not yet regarded as a dwelling place. Only after thirty days does it become, de facto, home. In Israel, however, one who rents a house is immediately obligated, mishum Yishuv eretz Yisrael, “because of the command to settle Israel.” Outside Israel, Jewish life is a way, a path, a route. Even an encampment, a place of rest, is still called a journey.”
Encampments and Journeys (Pekudei, Covenant & Conversation)