A.T. Robertson Commentary Hebrews 9:27

"And inasmuch as it is appointed unto men once to die, and after this [cometh] judgment;" — Hebrews 9:27 (ASV)

It is appointed (αποκειτα). Present middle (or passive) of αποκειμα, "is laid away" for men. Cf. same verb in Lu 19:20; Colossians 1:5; 2 Timothy 4:8 (Paul's crown).

Once to die (απαξ αποθανειν). Once for all to die, as once for all to live here. No reincarnation here.

After this cometh judgement (μετα τουτο κρισις). Death is not all. Man has to meet Christ as Judge as Jesus himself graphically pictures (Matthew 25:31–46; John 5:25–29).