Sahih al-Bukhari 3883
صحيح البخاري#3883SahihNarrated Al-Abbas bin `Abdul Muttalib:That he said to the Prophet (ﷺ) "You have not been of any avail to your uncle (Abu Talib) (though) by Allah, he used to protect you and used to become angry on your behalf." The Prophet (ﷺ) said, "He is in a shallow fire, and had It not been for me, he would have been in the bottom of the (Hell) Fire
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Every narration in Sahih al-Bukhari is accepted as Sahih (authentic) by the established status of the book.
In-book reference: 63:108