Musnad Ahmad 346
It was narrated from ‘Amr bin Shu`aib from his father that his grandfather said:
A man killed his (own) son deliberately and the
case was referred to `Umar bin al Khattab (رضي الله عنه), who ruled that the murderer should pay one hundred camels (as diyah): thirty three-year-old she-camels, thirty four-year-old she-camels and forty five-year-old she camels. He said: And the killer does not inherit anything. Were it not that I heard the Messenger of Allah (ﷺ)  say, `No father is to be killed in retaliation for his son,” I would have executed you.
حَدَّثَنَا أَبُو الْمُنْذِرِ، إِسْمَاعِيلُ بْنُ عُمَرَ أُرَاهُ عَنِ حَجَّاجٍ، عَنْ عَمْرِو بْنِ شُعَيْبٍ، عَنْ أَبِيهِ، عَنْ جَدِّهِ، قَالَ قَتَلَ رَجُلٌ ابْنَهُ عَمْدًا فَرُفِعَ إِلَى عُمَرَ بْنِ الْخَطَّابِ رَضِيَ اللَّهُ عَنْهُ فَجَعَلَ عَلَيْهِ مِائَةً مِنْ الْإِبِلِ ثَلَاثِينَ حِقَّةً وَثَلَاثِينَ جَذَعَةً وَأَرْبَعِينَ ثَنِيَّةً وَقَالَ لَا يَرِثُ الْقَاتِلُ وَلَوْلَا أَنِّي سَمِعْتُ رَسُولَ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ يَقُولُ لَا يُقْتَلُ وَالِدٌ بِوَلَدِهِ لَقَتَلْتُكَ‏.‏