In Islam, Adultery is punished by stoning and if 4 people claim to have seen someone committing adultery then the punishment is carried out My question is how do we know the 4 people are telling the truth? 4 people can easily conspire together to kill someone, so what if 4 people accuse someone of adultery and get him killed? They can do it over and over again with anyone whom they hate Under an Islamic State, what is there to prevent this from happening? This is not something that would take place rarely, it could in fact happen all the time. The Quran only mentions 4 witnesses as the requirement for the punishment, but is that all that is required? Wouldn't that mean that 4 friends can team up together against someone and have him killed by falsely accusing him of adultery?