وَ رَوَى مُحَمَّدُ بْنُ قَيْسٍ عَنْ أَبِي جَعْفَرٍ ع أَنَّهُ قَالَ:
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فِي رَجُلٍ قَتَلَ أُمَّهُ قَالَ إِذَا كَانَ خَطَأً فَإِنَّ لَهُ نَصِيباً مِنْ مِيرَاثِهَا وَ إِنْ كَانَ قَتَلَهَا مُتَعَمِّداً فَلَا يَرِثُ مِنْهَا شَيْئاً.
English translationBab Ul Qaim Publications
Hadith.5245 - Muhammad ibn Qays narrated from Abu Jafar Imam Muhammad ibn Ali Al-Baqir (as) that he said regarding a man who killed his mother: "If he killed her accidentally, he is entitled to a share of her inheritance. However, if he killed her intentionally, he does not inherit anything from her."
Translation: Bab Ul Qaim Publications·Thaqalayn link·The Arabic above is the original.