Hebrews 7:11-15 argues the Levitical priesthood could not bring perfection, necessitating a priest from another order — the same logic that Jesus cannot serve on earth.

In Numbers 16:40, God commands that only Aaron's descendants may offer incense — showing why Jesus, from Judah, cannot be an earthly priest.

2 Chronicles 26:18 shows priests confronting King Uzziah for attempting to burn incense — a clear example that only Aaronic priests may offer gifts.

Numbers 3:10 commands that only Aaron and his sons guard the priesthood — a direct law excluding outsiders, underlying Hebrews 8:4's claim about Jesus not being an earthly priest.

In 2 Chronicles 26:19, Uzziah is struck with leprosy for his unauthorized incense offering — illustrating the severe consequence of crossing priestly boundaries.