Sahih al-Bukhari 7321
Sahih al-Bukhari · Book 96: Holding Fast to the Qur'an and Sunnah · The sin of the person who invites others to an evil deed or establishes a bad tradition
Narrated `Abdullah:
حَدَّثَنَا الْحُمَيْدِيُّ ، حَدَّثَنَا سُفْيَانُ ، حَدَّثَنَا الأَعْمَشُ ، عَنْ عَبْدِ اللَّهِ بْنِ مُرَّةَ ، عَنْ مَسْرُوقٍ ، عَنْ عَبْدِ اللَّهِ ، قَالَ قَالَ النَّبِيُّ صلى الله عليه وسلم " لَيْسَ مِنْ نَفْسٍ تُقْتَلُ ظُلْمًا إِلاَّ كَانَ عَلَى ابْنِ آدَمَ الأَوَّلِ كِفْلٌ مِنْهَا ـ وَرُبَّمَا قَالَ سُفْيَانُ مِنْ دَمِهَا ـ لأَنَّهُ أَوَّلُ مَنْ سَنَّ الْقَتْلَ أَوَّلاً ".
The Prophet (ﷺ) said, "None is killed unjustly, but the first son of Adam will have a part of its burden." Sufyan said, "..a part of its blood because he was the first to establish the tradition of murdering"