Musnad Abu Ya'la al-Mawsili 161:67

Muhammad ibn Abi Bakr al-Muqaddami narrated to us, Abu 'Awanah narrated to us, from 'Abd al-Malik ibn 'Umayr, from 'Abdullah ibn al-Harith ibn Nawfal, from al-'Abbas ibn 'Abd al-Muttalib, who said: "O Messenger of Allah, have you benefited Abu Talib? For he used to protect you and become angry for your sake." He said: "He is in a shallow part of the Fire, and were it not for me, he would have been in the lowest depths."