Mitzvah of Settling in Israel - Yishuv Eretz Yisrael
Legal Issues
Having a Nochri write a contract for a Jew to buy land in Surya, Doorpost Scroll [Mezuzah] from a rented house in Israel, when leaving: Menachot 44a [see Rashi "Mishum Yishuv"]
Whether one may ascend to live in Israel in post-Temple times: Berachot 24b
Beyond the Law
Sages who planned on moving to Israel avoiding sages who ruled one could not do this in post-Temple times: Berachot 24b
The Merit of living in Israel was what allowed the birth of Isaac: Rosh HaShanah 16b