Leviticus 15:20

16 When a man has an emission of semen, he must bathe his whole body with water, and he will be unclean until evening.

17 Any clothing or leather on which there is an emission of semen must be washed with water, and it will remain unclean until evening.

18 If a man lies with a woman and there is an emission of semen, both must bathe with water, and they will remain unclean until evening.

19 When a woman has a discharge consisting of blood from her body, she will be unclean due to her menstruation for seven days, and anyone who touches her will be unclean until evening.

20 Anything on which she lies or sits during her menstruation will be unclean,

21 and anyone who touches her bed must wash his clothes and bathe with water, and he will be unclean until evening.

22 Whoever touches any furniture on which she was sitting must wash his clothes and bathe with water, and he will be unclean until evening.

23 And whether it is a bed or furniture on which she was sitting, whoever touches it will be unclean until evening.

24 If a man lies with her and her menstrual flow touches him, he will be unclean for seven days, and any bed on which he lies will become unclean.

Read all of Leviticus 15