Leviticus 15:19
19 “When a woman has a discharge, and the discharge in her body is blood, she shall be in her menstrual impurity for seven days, and whoever touches her shall be unclean until the evening.
Leviticus 15:28
28 But uif she is cleansed of her discharge, she shall count for herself seven days, and after that she shall be clean.
Leviticus 18:19
19 c“You shall not approach a woman to uncover her nakedness while she is in her menstrual uncleanness.