"The Messenger of Allah [SAW] said: 'Do not revert to disbelievers after I am gone, striking the necks of one another (killing one another). No man is to be punished for the sins of his father, or for the sins of his brother.'" (Using translation from Nasāʾī 4126)
قَالَ رَسُولُ اللهِ ﷺ «لَا تَرْجِعُوا بَعْدِي كُفَّارًا يَضْرِبُ بَعْضُكُمْ رِقَابَ بَعْضٍ وَلَا يُؤْخَذُ الرَّجُلُ بِجِنَايَةِ أَبِيهِ وَلَا بِجِنَايَةِ أَخِيهِ»