В Коране, однако, это есть, и поиск этого занял у меня примерно 10 минут. Здесь цитируются различные переводы суры 5:38
"Sahih International: [As for] the thief, the male and the female, amputate their hands in recompense for what they committed as a deterrent [punishment] from Allah. And Allah is Exalted in Might and Wise.
Pickthall: As for the thief, both male and female, cut off their hands. It is the reward of their own deeds, an exemplary punishment from Allah. Allah is Mighty, Wise.
Yusuf Ali: As to the thief, Male or female, cut off his or her hands: a punishment by way of example, from Allah, for their crime: and Allah is Exalted in power.
Shakir: And (as for) the man who steals and the woman who steals, cut off their hands as a punishment for what they have earned, an exemplary punishment from Allah; and Allah is Mighty, Wise.
Muhammad Sarwar: Cut off the hands of a male or female thief as a punishment for their deed and a lesson for them from God. God is Majestic and All-wise.
Mohsin Khan: Cut off (from the wrist joint) the (right) hand of the thief, male or female, as a recompense for that which they committed, a punishment by way of example from Allah. And Allah is AllPowerful, AllWise.
Arberry: And the thief, male and female: cut off the hands of both, as a recompense for what they have earned, and a punishment exemplary from God; God is All-mighty, All-wise."
Вот здесь то же самое по русски: http://quran-online.ru/5:38
К сожалению, приходится отбросить версию, что эксперт просто ошибся, поскольку он не исправил свой пост после того, как наша редакция доставила ему эти цитаты в комментариях. Остается, что соврал, как ни печально.