وحكم النوع الأول: أن يكون المنهي عنه هو عين ما ورد عليه النهي فيكون قبيحاً، فلا يكون مشروعاً أصلاً
In the first category, prohibition falls upon the very act. Its forbidden form is wrong in itself and is not recognized as a lawful act.
Lying or unjust aggression, for example, is not an otherwise valid worship or contract whose legal form can remain in force despite the prohibition. The act itself is the object of censure.
Calling it “not legally prescribed” does not mean that it cannot physically occur: an unlawful act may be committed, but committing it does not make it lawful or valid.