Leviticus 15:5,6

And whosoever toucheth his bed. — The defiling power of the patient was so great that the bed, seat, or saddle which he rendered unclean by any of the above-named five acts polluted again any one who came in contact with these articles in seven different ways: by standing, sitting, lying, hanging, leaning, touching, or bearing them. The person thus polluted had to remain in this condition, debarred from the privileges of the sanctuary, till sundown, when he had to wash his garments, and immerse his whole body in water.