It is narrated from Sayyidah Umm Salamah (may Allah be pleased with her) that Sayyiduna al-Harith bin Hisham (may Allah be pleased with him) came to the Prophet (peace and blessings be upon him) in the year of the Farewell Hajj and said: O Messenger of Allah! I used to maintain the ties of kinship, treat my neighbour well, take care of orphans, and feed guests and the poor, and Hisham bin al-Mughirah used to do all of this as well. So what do you think of him, O Messenger of Allah? He (peace and blessings be upon him) said: "Every grave whose occupant did not bear witness that there is no true god except Allah is a burning ember of the Fire. I found my uncle Abu Talib in the deepest depths of the Fire, and Allah brought him out from there because of his kinship with me and his kindness to me, and placed him in a shallow part of the Fire."
Hadith Referenceالمعجم الكبير للطبراني / مسند النساء / 20274