مُسْنَدُ أَحْمَدَ
Musnad Ahmad 1773
Musnad Bani Hashim (Hadeeth of al-'Abbas bin 'Abdul-Muttalib from the Prophet)
Al-"Abbas narrated: I said to the Prophet (ﷺ): How did you help your uncle, when he used to protect you and get angry for your sake? He said: “He is in the shallowest part of Hell; were it not for me, he would be in the lowest depths of Hell."
Musnad Ahmad 1774Sahih (Darussalam) [ al Bukhari (3883) and Muslim (209)]