Leviticus 15:23 in the World English Bible
If it is on the bed, or on anything she sits on, when he touches it, he shall be unclean until the evening.
Context
22 And whosoever toucheth any thing that she sat upon shall wash his clothes, and bathe himself in water, and be unclean until the even.
23 And if it be on her bed, or on any thing whereon she sitteth, when he toucheth it, he shall be unclean until the even.
24 And if any man lie with her at all, and her flowers be upon him, he shall be unclean seven days; and all the bed whereon he lieth shall be unclean.