Observe how uncleanness is attached to those who, even in religions services, were obeying the divine precepts. Yes, it must be so. Everything, even our most holy things, carry with them an impurity. None but he who is holy, harmless, undefiled, and separate from sinners, can be clean before GOD. Hebrews 7:26.
Related Commentaries of Numbers 19:7
Numbers 19:7-8
7 Then the priest shall wash his clothes, and he shall bathe his flesh in water, and afterward he shall come into the camp, and the priest shall be unclean until the even.
8 And he that burneth her shall wash his clothes in water, and bathe his flesh in water, and shall be unclean until the even.