What is the ruling on a religious scholar, who works as an Imam and Khatib, exploiting his position to collect money designated for the treatment of a sick person and then taking it for himself, under the pretext that he strove to obtain it?

If a man takes money in the name of another person without his permission, he is considered an agent for that person, and it is not permissible for him to dispose of it without the money owner's permission. This is considered a betrayal of trust, and he must return the money to its owner, unless the owner permits him to keep it. However, if the money was taken from a charity for the purpose of treating a specific person, and that person has already received treatment, it is not permissible for either of them to benefit from it, and it must be returned to the charity, even if indirectly.