According to the Book of Exodus, the law forbidding adultery was codified for the Israelites at biblical Mount Sinai. It was one of the Ten Commandments written by the finger of God on stone tablets.[8] Details regarding the administration of the law and additional boundaries on sexual behavior followed.[2] For example, the ordeal of the bitter water was established to prove the guilt or innocence of a wife whose husband suspected her of adultery.[10] Adultery was a capital crime,[11] and if adulterers were caught, at least two witnesses were required before the death penalty would be carried out.[12]