ISB ~ Hebrews 12 v23

the assembly:Or, “the Church”. the first-born: The saints in heaven (the Greek is plural) united with Christ the first-born Son (1:6).

enrolled:i.e., registered by name in the heavenly Book of Life (Lk 10:20; Rev 21:27).

spirits of just men:Perhaps the righteous men and women of OT times who were perfected by Christ (11:40) and led into heaven (Eph 4:8). Like all the faithful departed, only their “spirits” are present with God as they await the resurrection of their bodies at the end of history (1 Cor 15:51-55).