ISB ~ Hebrews 12 v22

Mount Zion:The heavenly summit (Rev 14:1) whose counterpart is the earthly mountain where Jerusalem has stood for centuries (Ps 76:2; Is 2:3).

heavenly Jerusalem:Alluded to earlier as the city whose foundations were laid by God in eternity (11:10, 16). Other passages refer to this as the Jerusalem “above” (Gal 4:26) and the “holy city” from heaven (Rev 21:2, 10).