shall stand. have stood [and shall still stand.] The reference is to the Passover, which had been kept for "all Israel". See App-67.
Jerusalem. Note the Figure of speech Anadiplosis (App-6), the word being repeated at the beginning of the next verse.
compact. coupled together (as by. bridge), as Moriah was joined with Zion by the Millo. See note on 1Ki 9:15. 2 Kings 12:20, and App-68.