قَالَ رَسُولُ اللَّهِ ص إِذَا دَخَلَ رَجُلٌ بَلْدَةً فَهُوَ ضَيْفٌ عَلَى مَنْ بِهَا مِنْ أَهْلِ دِينِهِ حَتَّى يَرْحَلَ عَنْهُمْ وَ لَا يَنْبَغِي لِلضَّيْفِ أَنْ يَصُومَ إِلَّا بِإِذْنِهِمْ لِئَلَّا يَعْمَلُوا الشَّيْءَ فَيَفْسُدَ عَلَيْهِمْ وَ لَا يَنْبَغِي لَهُمْ أَنْ يَصُومُوا إِلَّا بِإِذْنِ الضَّيْفِ لِئَلَّا يَحْتَشِمَهُمْ[1] فَيَشْتَهِيَ الطَّعَامَ فَيَتْرُكَهُ لَهُمْ.
‘The Messenger of Allah, O Allah, grant compensation to Muhammad and his family worthy of their services to Your cause, has said, “When a man enters a town (residence), he is a guest of the inhabitants of that town who are followers of the religion he follows until he leaves that town (residence). It is not proper for