Deuteronomy 13:13 Commentary: Rashi, Or HaChaim, Siftei Chakhamim & Rav Hirsch

לשבת שם [IF THOU SHALT HEAR SAY IN THE CITIES WHICH THE LORD THY GOD HATH GIVEN THEE] TO ABIDE THERE — The words “to abide there” are added to exclude Jerusalem which city was not intended as a dwelling-place (Sifrei Devarim 92:5; cf. Bava Kamma 82b).

לשבת שם לאמור, "in which to dwell, saying, etc." Moses uses the word לאמור. According to Ketuvot 110 that it is a positive commandment to live in what used to be the land of Canaan, we must read the verse as if the words לשבת שם לאמור had been written in the sequence לאמור לשבת שם.

Which was not given as a dwelling place, etc. I.e., to any individual, but rather any Israelite has the right to dwell there, because Jerusalem was not apportioned to the tribes.