Numbers 19:11-22 gives the detailed purification ritual for corpse defilement applied here – sprinkling on third and seventh days.

Numbers 19:12 commands cleansing on the third and seventh days, exactly the schedule prescribed here.

Numbers 19:16 states that touching a slain person causes seven-day uncleanness, directly applying to the warriors here.

Numbers 19:19 describes sprinkling on the third and seventh days, the same ritual required for purification here.

Numbers 5:2 requires those unclean from contact with the dead to be put out of camp, grounding the purification command here.