When is a person considered to have left the mosque, and when is he required to repeat the greeting of the mosque?

Question:
The questioner asks: What are the boundaries of the mosque such that if one leaves them, he is outside, and it becomes obligatory for him to repeat the greeting of the mosque?

Answer:
The boundaries of the mosque are its doors. If you go out of the door of the mosque, you are outside the mosque. If you enter the door of the mosque, you are inside the mosque. Does this need clarification? No, it does not need clarification. Yes.