Parashas Masei · Passuk 34:12 · TT note 1
Chabad.org — English translation + Rashi
Torah Temimah points to Bechoros 55a (TT note on “הָאָרֶץ לִגְבֻלֹתֶיהָ”).
E-Daf — Bechoros 55a · Sefaria
English: “The land according to its borders” — this teaches that the whole of it is one single border of the Land of Israel.
Halakhic unity of the Land — one contiguous border for purposes of sanctity and obligation.
The Torah’s border description treats the entire Land as a single continuous domain; the borders define one integrated Eretz Yisrael.