Leviticus 15:22

“‘If a woman has a discharge, and her discharge in her flesh is blood, she shall be in her impurity seven days. Whoever touches her shall be unclean until the evening.

“‘Everything that she lies on in her impurity shall be unclean. Everything also that she sits on shall be unclean.

Whoever touches her bed shall wash his clothes, and bathe himself in water, and be unclean until the evening.

If it is on the bed, or on anything she sits on, when he touches it, he shall be unclean until the evening.

“‘If any man lies with her, and her monthly flow is on him, he shall be unclean seven days; and every bed he lies on shall be unclean.

“‘If a woman has a discharge of her blood many days not in the time of her period, or if she has a discharge beyond the time of her period, all the days of the discharge of her uncleanness shall be as in the days of her period. She is unclean.