Vayikra 15:19-21

Orthodox Jewish Bible

¹⁹ And if an isha have a discharge, and her discharge in her body be dahm, she shall be in her state of niddah (state of menstrual separation) seven days; and whosoever toucheth her shall be tamei until the erev.

²⁰ And everything that she lieth upon in her niddah shall be tamei; everything also that she sitteth upon shall be tamei.

²¹ And whosoever toucheth her bed shall immerse his garments, and immerse himself in mayim, and be tamei until the erev.