Al-Kāfi - Volume 6 > When a Man Enters a Town he is a Guest of his Brothers (in belief) who Live there
Hadith #1

عَلِيُّ بْنُ إِبْرَاهِيمَ عَنْ أَبِيهِ عَنْ إِبْرَاهِيمَ بْنِ إِسْحَاقَ الْأَحْمَرِ بِإِسْنَادِهِ عَمَّنْ ذَكَرَهُ عَنِ الْفُضَيْلِ بْنِ يَسَارٍ عَنْ أَبِي جَعْفَرٍ ( عليه السلام ) قَالَ قَالَ رَسُولُ اللَّهِ ( صلى الله عليه وآله ) إِذَا دَخَلَ رَجُلٌ بَلْدَةً فَهُوَ ضَيْفٌ عَلَى مَنْ بِهَا مِنْ إِخْوَانِهِ وَ أَهْلِ دِينِهِ حَتَّى يَرْحَلَ عَنْهُمْ .

1. Ali ibn Ibrahim has narrated from his father from ‘ Abd al-Rahman ibn Ishaq al-Ahmar through the chain of his narrators from those whom he has mentioned from al-Fudayl ibn Yasar who has said the following: “Abu Ja‘far, ‘Alayhi al-Salam, has stated this Hadith. ‘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 he then is a guest of his brothers (in belief) who live there and the people of his religion until he leaves that town.”’