"One witness shall not rise up against a man for any iniquity or for any sin"—Deuteronomy 19:15.
It is forbidden for the courts to execute punishments or expropriate money based on the testimony provided by a single witness—even if that witness is completely trustworthy.
Though courts cannot punish or expropriate money based on the testimony of one witness, they can obligate the defendant to declare his innocence under oath based on such testimony.
