Numbers 3:38 repeats the same command—Aaron and sons guard the sanctuary and outsiders are executed—reinforcing the priestly exclusivity.

Numbers 16:35 records the fire from the Lord consuming the 250 unauthorized incense offerers—a direct example of the penalty stated here.

Numbers 16:40 memorializes the Korah incident, warning outsiders not to approach the altar—explicitly recalling the prohibition in this verse.

Numbers 18:3 reinforces the same restriction—Levites assist but must not approach sanctuary vessels or altar, on pain of death.

Numbers 18:7 repeats the warning that outsiders who approach the sanctuary will be put to death — identical to the instruction here.

Numbers 18:2 instructs Levites to join Aaron in ministry, setting up the priestly assistance structure that Numbers 3:10 guards.

Numbers 18:4 repeats the command: no outsider shall come near, directly echoing Numbers 3:10's warning.

Numbers 18:22 reinforces the same prohibition: only priests may approach the sanctuary, with the death penalty for outsiders.

Hebrews 10:19-22 offers bold access to God through Christ's blood, directly contrasting the deadly restriction for outsiders in Numbers 3:10.

Ephesians 2:19 reverses the exclusion—Gentiles become fellow citizens, contrasting with the 'outsider put to death' law in Numbers 3:10.

Ezekiel 44:8 rebukes Israel for allowing unauthorized persons to serve in the sanctuary, directly echoing the exclusive priesthood charge.

2 Chronicles 26:16-21 describes King Uzziah's leprosy for usurping priestly incense duty, enforcing the same exclusive priesthood.

2 Samuel 6:7 records Uzzah's death for touching the ark, illustrating the same strict holiness principle as in Numbers 3:10.

1 Samuel 6:19 shows the deadly consequence for unauthorized looking at the ark, echoing the penalty for outsiders approaching the sanctuary.

1 Kings 12:31 shows Jeroboam appointing non-Levite priests, directly violating the exclusive Aaronic priesthood commanded in Numbers 3:10.

1 Kings 13:33 reinforces Jeroboam's persistent violation of Numbers 3:10 by again appointing priests from any people, not Levites.

Ezra 2:62 shows priests excluded for lacking genealogical proof, directly applying the lineage requirement from Numbers 3:10.

Exodus 29:33 restricts eating consecrated offerings to priests alone, paralleling the same holy boundary for outsiders.

2 Chronicles 23:7 applies the same death penalty for unauthorized entry into the temple, reflecting the rule from Numbers 3:10.

Deuteronomy 18:5 explains the divine choice of Levi for priesthood, echoing the appointment and exclusive service required in Numbers 3:10.