Musnad Ahmad 495:6

Ya'qub narrated to us, my father narrated to us, from Muhammad ibn Ishaq, who said: Al-Zuhri narrated to us, from Muhammad ibn Abdullah ibn Nawfal ibn al-Harith, from Abd al-Muttalib ibn Rabi'ah ibn al-Harith, who said: Al-Abbas ibn Abd al-Muttalib and Ibn Rabi'ah ibn al-Harith gathered in the mosque, and he mentioned the hadith.