It is reported on the authority of 'Abbas b. Abd al-Muttalib that he said:Messenger of Allah, have you benefited Abu Talib in any way for he defended you and was fervent in your defence? The Messenger of Allah (may peace he upon him) said: Yes; he would be in the most shallow part of the Fire and were not for me, he would have been in the bottom-most depth of Hell

Abdullah b. al-Harith reported:I heard Abbas say: I said: Messenger of Allah, verily Abu Talib defended you and helped you; would it be beneficial for him? He (the Holy Prophet) said: Yes; I found him in the lowest part of the Fire and I brought him to the shallow part

This hadith is narrated from the Apostle (ﷺ) like one narrated by Abu 'Uwana on the authority of the chain of transmitters like Muhammad b. Hatim, Yahya b. Sa'id, Abu Sufyan, 'Abbas b. 'Abd al-Muttalib and others