Leviticus 15:18

15:18 If a man lies with a woman and there is an emission of semen, they shall both bathe themselves in water, and be unclean until the evening.
-World English Bible

Other Translation

15:18 The woman also with whom man shall lie [with] seed of copulation, they shall [both] bathe [themselves] in water, and be unclean until the even.
-King James Version