(Devarim 11:18) "And you shall place these words upon your hearts and upon your souls": This refers to Torah. "and you shall bind them as a sign upon your hands": This refers to tefillin. This tells me only of tefillin and Torah study. Whence do I derive (the same for) other mitzvoth? It follows inductively (binyan av), viz.: Tefillin is not (exactly) like Torah study, and Torah study is not like tefillin. Their common denominator is that they are mitzvoth pertaining to the body, which are not contingent upon the land, and they obtain both in Eretz Yisrael and outside of it — so, all mitzvoth pertaining to the body, which are not contingent upon the land, obtain both in Eretz Yisrael and outside of it. And those that are contingent upon the land obtain only in Eretz Yisrael — except arlah (viz. Vayikra 19:23) and kilayim (viz. Devarim 22:9). R. Eliezer says: (The law of) Chadash — ("new produce") too, (obtains both in Eretz Yisrael and outside it, viz. Vayikra 23:14).
(דברים יא יח) וְשַׂמְתֶּם אֶת דְּבָרַי אֵלֶּה עַל לְבַבְכֶם – זֶה תַּלְמוּד תּוֹרָה, וּקְשַׁרְתֶּם אֹתָם לְאוֹת עַל יֶדְכֶם – אֵלּוּ תְּפִלִּין. אֵין לִי אֶלָּא תְּפִלִּין וְתַלְמוּד תּוֹרָה, שְׁאָר מִצְווֹת שֶׁבַּתּוֹרָה מִנַּיִן? הֲרֵי אַתָּה דָן מִבִּנְיַן אָב שֶׁבֵּין שְׁנֵיהֶם: לֹא רְאִי תְּפִלִּין כִּרְאִי תַּלְמוּד תּוֹרָה וְלֹא רְאִי תַּלְמוּד תּוֹרָה כִּרְאִי תְּפִלִּין. הַצַּד הַשָּׁוֶה שֶׁבָּהֶם – שֶׁהֵם מִצְווֹת הַגּוּף שֶׁאֵין תְּלוּיוֹת בָּאָרֶץ, וְנוֹהֲגוֹת בָּאָרֶץ וּבְחוּצָה לָאָרֶץ. כָּךְ כָּל מִצְווֹת הַגּוּף שֶׁאֵין תְּלוּיוֹת בָּאָרֶץ – נוֹהֲגוֹת בָּאָרֶץ וְחוּצָה לָאָרֶץ, וְשֶׁתְּלוּיָה בָּאָרֶץ אֵינָהּ נוֹהֶגֶת אֶלָּא בָּאָרֶץ, חוּץ מִן הָעָרְלָה וְהַכִּלְאַיִם. רַבִּי אֱלִיעֶזֶר אוֹמֵר: אַף הֶחָדָשׁ.
(Devarim 11:18) "And you shall place these words upon your hearts and upon your souls": This refers to Torah. "and you shall bind them as a sign upon your hands": This refers to tefillin. This tells me only of tefillin and Torah study. Whence do I derive (the same for) other mitzvoth? It follows inductively (binyan av), viz.: Tefillin is not (exactly) like Torah study, and Torah study is not like tefillin. Their common denominator is that they are mitzvoth pertaining to the body, which are not contingent upon the land, and they obtain both in Eretz Yisrael and outside of it — so, all mitzvoth pertaining to the body, which are not contingent upon the land, obtain both in Eretz Yisrael and outside of it. And those that are contingent upon the land obtain only in Eretz Yisrael — except arlah (viz. Vayikra 19:23) and kilayim (viz. Devarim 22:9). R. Eliezer says: (The law of) Chadash — ("new produce") too, (obtains both in Eretz Yisrael and outside it, viz. Vayikra 23:14).