דברים פרק יב, כט וישבת בארצם
ספרי פרשת ראה פיסקא פ מכאן אמרו ישיבת ארץ ישראל שקולה כנגד כל המצות שבתורה
T.T. It is possible to explain the reason for this general rule, since it is impossible to do many mitzvos unless you are living in Eretz Yisrael. Further, mitzvos done in Galus are done so that when we return to the Land, they would not be like new ones. Thus, the mitzvah of living in Eretz Yisrael is equal to all mitzvos since it is the foundation to fulfillment of the mitzvos.
Many Rishonim hold that this mitzvah is from the Torah even today, but the Rambam does not list this as one of the mitzvos, except in the time of the Bais HaMikdash. This opinion states that this mitzvah only becomes obligatory again when the Geulah comes.
T.T. As we explained above, this mitzvah of dwelling in Eretz Yisrael is the foundation for all mitzvos, then, it appears that Rambam is correct. Nowadays, without the Bais HaMikdash, it is impossible to do most of the mitzvos that are dependent on living in Eretz Yisrael, and thus, this mitzvah of dwelling in Eretz Yisrael can only be when all the mitzvos can be obligatory.
דברים פרק טז, ג לחם עני
פסחים ל"ו א' עני כתיב קרינן עוני אמר שמואל לחם עוני לחם שעונין עליו דברים הרבה
T.T. What are the many things that are said on the Matzos?
The story of the going out of Egypt, Hallel, the Song of Praise, Birchas haMazon
