Musannaf Ibn Abi Shayba 18:1006

Abu Bakr narrated to us, he said: Ibn ‘Uyaynah narrated to us, from Ibn Abi Najih, from Kardam, that a man asked Ibn ‘Abbas, Abu Hurayrah, and Ibn ‘Umar about a man who killed a believer: Does he have a repentance? They all said: Is he able to bring him back to life? Is he able to seek a tunnel into the earth or a ladder into the sky? Is he able to not die?