Leviticus 15:27
And whosoever toucheth those things shall be unclean, and shall wash his clothes, and bathe himself in water, and be unclean until the even. And whosoever toucheth those things shall be unclean, and shall wash his clothes, and bathe himself in water, and be unclean until the even.
Leviticus 15:27 belongs to the cleansing laws regulating uncleanness given to ancient Israel in Leviticus 12-15, which also address leprosy. It gives a cleansing and isolation rule for anyone touching the person or objects involved, requiring him to wash his clothes, bathe himself in water, and remain unclean until evening. Being unclean until evening meant staying away from other people for the rest of the day so that air and sunshine could help complete disinfection, and these precautions helped prevent disease from spreading. Bodily uncleanness had to be removed before the sanctuary could undergo its cleansing with blood, with the person or object first made visibly clean so that it could then be called clean. This physical purification was distinct from the sanctuary's real cleansing, which addressed moral defilement.
The verse shows the exceeding sinfulness of sin emphasized throughout Leviticus. The leprosy dealt with in these laws is a fitting type of sin. The verse is one of the mighty object-lessons God gave in Leviticus, and its dry detail of law and regulation must be read seeing Jesus Christ in it as the Lamb of God who takes away the sin of the world, which gives it new life and makes it a blessing to the reader. As an example of the need for cleansing and obedience, the verse points to bodily cleanliness and health reform as part of preparing clean vessels for God's Spirit and the latter rain, and Israel's failure to remain faithful to its cleansing instructions warns the remnant not to abandon health reform or other cleansing truths.