Leviticus 15:7
Whoever touches the man who has a discharge must wash their clothes and bathe with water, and they will be unclean till evening. Direct contact with the man himself — not only with his bed or seat — creates the same cloth-washing and until-evening impurity. The person who touches the man with the discharge is not more impure than the person who touches his bed: the direct contact and the mediated contact produce equivalent impurity requiring equivalent purification. The equality of the direct and mediated contact-impurity communicates the consistent principle of the discharge regulations.