Ibn Mas'ud (May Allah be pleased with him) reported:
The Prophet ﷺ said, "The first son of Adam* takes a share of the guilt of every one who murders another wrongfully because he was the initiator of committing murder".

[Al-Bukhari and Muslim].

* The son of Adam in the Hadith is said to be Qabil. Allah tells us about his story in Surat Al-Ma'idah (The Table spread with Food). Verses 27-31.

وعن ابن مسعود رضي الله عنه أن النبي ﷺ قال:
"ليس من نفس تقتل ظلماً إلا كان على ابن آدم الأول كفل من دمها لأنه كان أول من سن القتل" ((متفق عليه)) .