Musnad Abu Ya'la al-Mawsili 155:116

Zuhayr narrated to us, Ibn ‘Uyaynah narrated to us, from al-Zuhri, from Abu Salamah, from Abu Hurayrah: That the Messenger of Allah (may Allah bless him and grant him peace), when al-Najashi died, informed them that he had died, so they sought forgiveness for him.