Musnad Abu Ya'la al-Mawsili 42:165

Zakariya ibn Yahya narrated to us, Ibn Fudayl narrated to us, from his father, from Muhammad ibn Jahadah, from Atiyyah, from Abu Sa’id, from the Prophet, may Allah bless him and grant him peace, who said: "A neck [of fire] will be sent forth from Hell on the Day of Resurrection. It will say: 'I have been entrusted with three: every obstinate tyrant, everyone who set up another god alongside Allah, and everyone who killed a soul without [it being in retaliation for] a soul.'"