A visitor reaches a home, offers salām, and asks for permission to enter. The occupants may politely decline if it is not a suitable time. Offering a greeting does not erase the home’s private boundaries; entry still requires permission.
A child, someone unfamiliar with the language, or a person seeking urgent assistance may require a sensitive response. Teaching etiquette should remain respectful and proportionate.
In لَمْ يَبْدَأْ, لَمْ negates a past event and places the present-tense verb in the jussive form. The final sukūn in يَبْدَأْ reflects this construction.