Al-Kāfi - Volume 7 > Inheritance of People of other Religions
Hadith #4

4- عَنْهُ عَنْ مُوسَى بْنِ بَكْرٍ عَنْ عَبْدِ اللهِ بْنِ أَعْيَنَ قَالَ قُلْتُ لأبِي جَعْفَرٍ (عَلَيْهِ السَّلام) جُعِلْتُ فِدَاكَ النَّصْرَانِيُّ يَمُوتُ وَلَهُ ابْنٌ مُسْلِمٌ أَيَرِثُهُ قَالَ فَقَالَ نَعَمْ إِنَّ اللهَ عَزَّ وَجَلَّ لَمْ يَزِدْهُ بِالإسْلامِ إِلا عِزّاً فَنَحْنُ نَرِثُهُمْ وَلا يَرِثُونَّا.

4. It is narrated from the narrator of the previous Hadith from Musa ibn Bakr from ‘Abd Allah ibn ‘A’yan who has narrated the following: “I once said to abu Ja’far, Alayhi al-Salam, ‘I pray to Allah to keep my soul in service for your cause, if a Christian man dies and has a Muslim son, can he inherit from him?’ He (the Imam) said, ‘Yes, because Allah, most Majestic, most Glorious, through al-Islam has increased his honor, so we inherit from them but they cannot inherit from us.’”