رَوَى أَحْمَدُ بْنُ مُحَمَّدِ بْنِ عِيسَى عَنْ عَلِيِّ بْنِ أَحْمَدَ بْنِ أَشْيَمَ عَنْ مُحَمَّدِ بْنِ اَلْقَاسِمِ اَلْجَوْهَرِيِّ عَنْ أَبِيهِ عَنْ حَرِيزِ بْنِ عَبْدِ اَللَّهِ عَنْ أَبِي عَبْدِ اَللَّهِ عَلَيْهِ اَلسَّلاَمُ قَالَ: "وُلِدَ عَلَى عَهْدِ أَمِيرِ اَلْمُؤْمِنِينَ عَلَيْهِ اَلسَّلاَمُ مَوْلُودٌ لَهُ رَأْسَانِ فَسُئِلَ أَمِيرُ اَلْمُؤْمِنِينَ عَلَيْهِ اَلسَّلاَمُ يُوَرَّثُ مِيرَاثَ اِثْنَيْنِ أَوْ وَاحِدٍ فَقَالَ "يُتْرَكُ حَتَّى يَنَامَ ثُمَّ يُصَاحُ بِهِ فَإِنِ اِنْتَبَهَا جَمِيعاً مَعاً، كَانَ لَهُ مِيرَاثٌ وَاحِدٌ وَ إِنِ اِنْتَبَهَ وَاحِدٌ وَ بَقِيَ اَلْآخَرُ نَائِماً وُرِّثَ مِيرَاثَ اِثْنَيْنِ".
Ahmad ibn Muhammad ibn Isa narrated from Ali ibn Ahmad ibn Ashyam from Muhammad ibn Al-Qasim Al-Jawhari from his father from Hariz ibn Abdullah from Abu Abdullah Imam Jafar ibn Muhammad Al-Sadiq (a.s) who said: "During the time of the Commander of the Faithful (a.s), a child was born with two heads. Imam Ali ibn Abi Talib (a.s) was asked whether this child should inherit as one person or as two. Imam Ali (a.s) replied: 'Let the child sleep, then call out to them. If both heads wake up together, the child inherits as one person. But if one wakes up while the other remains asleep, then the child inherits as two.'"