Numbers 19:14

This is the law, when a man dieth in a tent: all that come into the tent, and all that is in the tent, shall be unclean seven days.

Cross-reference

Numbers 31:20 commands purification of garments after war killing, directly echoing the death uncleanness and purification theme in Numbers 19:14.

Numbers 6:9 deals with a Nazirite defiled by sudden death, mirroring Numbers 19:14's principle that death brings uncleanness.

Leviticus 21:1 prohibits priests from making themselves unclean for the dead, while Numbers 19:14 gives general corpse uncleanness rules for anyone.

Leviticus 21:11 further restricts priests from any dead body, echoing Numbers 19:14's death uncleanness but with stricter application.