Hebrews 7:8 contrasts mortal tithe-receivers with the living Christ — same argument that death prevented priests from continuing.

Hebrews 7:3 describes Melchizedek as having no beginning or end of life, contrasting with the dying Levitical priests in 7:23.

Leviticus 6:22 describes the anointed son succeeding the high priest, illustrating the OT pattern of priestly succession interrupted by death.

In Numbers 20:26, Aaron dies and Eleazar succeeds him, providing a concrete example of a priest's death ending his service.

Exodus 29:9 institutes a perpetual priesthood — yet Hebrews argues it was temporary due to death, creating a contrast.

1 Chronicles 6:3-14 lists the succession of high priests — illustrating the many priests due to death that Hebrews mentions.

Nehemiah 12:10 records the post-exilic high priest lineage — showing the ongoing succession because of death.

Nehemiah 12:11 continues the high priest genealogy — further evidence of many priests due to death.

Zechariah 1:5 asks where the ancestors and prophets are, emphasizing that even prophets die — parallels the mortality of priests.