لَا يُقْتَلُ الْأَبُ بِابْنِهِ إِذَا قَتَلَهُ وَ يُقْتَلُ الِابْنُ بِأَبِيهِ إِذَا قَتَلَ أَبَاهُ وَ قَالَ لَا يَتَوَارَثُ رَجُلَانِ قَتَلَ أَحَدُهُمَا صَاحِبَهُ[2].
"A father is not executed for killing his son, but a son is executed for killing his father." Imam (as) also said: "Two men who kill one another do not inherit from each other."