Silsilat al-Ahadith al-Sahihah

The Noble Prophet (peace and blessings of Allah be upon him) said: "Abbas is the uncle of the Messenger of Allah, and an uncle is a type of father." This hadith has been narrated from Sayyiduna Abu Hurairah, Sayyiduna Umar bin Khattab, Sayyiduna Hasan bin Muslim Makki, Sayyiduna Ali bin Abi Talib, and Sayyiduna Abdul Muttalib bin Rabee'ah bin Harith (may Allah be pleased with them).