Leviticus 16 opens by explicitly recalling the death of Aaron's two sons when they approached YHWH and died, making Chapter 10 a stated background for Day of Atonement access restrictions.

Foreshadowing / mirroring — very strong but debated lexical-canonical echo: Romans 3:25 applies hilasterion to Christ; the Greek Old Testament uses hilasterion for the atonement cover or “mercy seat,” including the blood-sprinkled inner-sanctuary rite of Leviticus 16. The mercy-seat reading makes Christ the place/person of atonement and divine meeting, but Paul’s exact nuance remains debated.

Leviticus 16 requires the high priest to make atonement for himself as well as for the people during the Day of Atonement. Hebrews contrasts such priests, who must repeatedly offer and who share human weakness, with Jesus, the fitting high priest whose self-offering is once for all. The contrast uses the Levitical priesthood as real background without reducing every priestly offering to Leviticus 16 alone.