"into the midst of its square": If it has no square, one is made for it.
If its square were outside of it, whence is it derived that it is gathered within it? From "into the midst of its square."
"and you shall burn with fire the city and all of its spoil": and not the spoil of Heaven
— whence it was ruled: Its consecrated objects are to be redeemed; its terumoth are to be left to spoil; its ma'aser sheni and holy writings are to be secreted.
"entirely, for the L-rd your G-d": If you execute judgment against a condemned city, I shall account it to you as if you sacrificed a burnt-offering "entirely" before Me. "And it shall be a heap forever": And thus is it written of Jericho (Joshua 26:6) "And Joshua swore … Cursed is the man … who shall arise and rebuild the city, Jericho." Do we not know that Jericho is its name? The intent is, rather, that it not be rebuilt and called by the name of a different city and that another city not be built and called "Jericho." (Ibid.)