Gender politics in the Torah have never been what you might call progressive. Nevertheless, what the scriptures dictate for proving the innocence of a woman suspected of adultery is pretty nuts.
Such a suspected woman—known as a sotah—must undergo what’s referred to as “the ordeal of the bitter water,” or the “ordeal of jealousy.” This evaluation, outlined in Numbers 5:11-31, is assigned by a husband and performed by a priest, who prepares a “meal-offering of jealousy”:
First, a snack of ground barley without oil or frankincense. Then, the priest unbinds her hair, has her swear an oath of loyalty, writes said oath on a scroll, then dissolves the scroll in water while mixing in dust from the Tabernacle. The woman then drinks the “bitter, curse-causing waters.”
One of two things then happen: If she is guilty, her “belly distends” and her “thigh falls,” and she becomes infertile. If she is innocent: Nothing happens. Unless she’s infertile, in which case, as a reward for the inconvenience, she might become fertile.