כִּֽי־הַחֲרֵ֣ם תַּחֲרִימֵ֗ם הַחִתִּ֤י וְהָאֱמֹרִי֙ הַכְּנַעֲנִ֣י וְהַפְּרִזִּ֔י הַחִוִּ֖י וְהַיְבוּסִ֑י כַּאֲשֶׁ֥ר צִוְּךָ֖ יְהוָ֥ה אֱלֹהֶֽיךָ׃
Lecz podasz ich zaklęciu: Chyttejczyka i Emorejczyka, Kanaanejczyka i Peryzejczyka, i Chywitę i Jebusytę, - jako ci rozkazał Wiekuisty, Bóg twój;
Rashi
כאשר צוך [BUT THOU SHALT DOOM THEM TO DESTRUCTION: THE HITTITES, … AND THE JEBUSITES,] AS [THE LORD THY GOD] HATH COMMANDED THEE — The words: “as God hath commanded thee” are intended to include the Girgashites (the seventh nation that is not mentioned here) (Sifrei Devarim 201:4).
Chizkuni
כי החרם תחרימם, “but you shall utterly destroy them.” You might think that also their belongings would be out of bounds to you, (as the booty from Jericho); in order to assure you that this is not so, the Torah wrote in Deut. 6,11, that you will capture (and keep) their houses and contents intact.
Rabbeinu Bahya
כי החרם תחרימם החתי והאמורי, ”rather, you shall utterly destroy them; the Chivite, the Emorite, etc.” In this instance the Torah enumerated only six of the seven nations omitting the Girgashi, either due to it's small size, or, as our Sages have explained, seeing they had emigrated as we mentioned earlier.