Jamieson, Fausset and Brown on Ezekiel 43:9

9. carcasses of their kings--It is supposed that some of their idolatrous kings were buried within the bounds of Solomon's temple [Henderson]. Rather, "the carcasses of their idols," here called "kings," as having had lordship over them in past times (Is 26:13); but henceforth Jehovah, alone their rightful lord, shall be their king, and the idols that had been their "king" would appear but as "carcasses." Hence these defunct kings are associated with the "high places" in Eze 43:7 [Fairbairn]. Le 26:30 and Jr 16:18, confirm this. Manasseh had built altars in the courts of the temple to the host of heaven (2Ki 21:5; 23:6).

I will dwell in the midst ... for ever--(Re 21:3).