A man insulted another man's father who had died during the days of ignorance. Abbas slapped him for it. The man's people came and swore they would slap Abbas just as he had slapped their man, and they took up their weapons.News of this reached the Prophet ﷺ, so he ascended the pulpit and said, "People, which of the inhabitants of the earth do you know to be most honored before Allah ?"They replied, "You are."He said, "Indeed, Abbas is from me and I am from him. Do not curse our dead, for you will hurt our living."The people then came and said, "Messenger of Allah, we seek refuge in Allah from your anger. Pray for forgiveness for us."
أخبرنا أحمد بن سليمان قال أنبأنا عبيد الله عن إسرائيل عن عبد الأعلى أنه سمع سعيد بن جبير يقول
أن رجلا وقع في أب كان له في الجاهلية فلطمه العباس فجاء قومه فقالوا ليلطمنه كما لطمه فلبسوا السلاح فبلغ ذلك النبي ﷺ فصعد المنبر فقال أيها الناس أي أهل الأرض تعلمون أكرم على الله عز وجل فقالوا أنت فقال إن العباس مني وأنا منه لا تسبوا موتانا فتؤذوا أحياءنا فجاء القوم فقالوا يا رسول الله نعوذ بالله من غضبك استغفر لنا
[Its chain is daif] Ibn Saad reported it in al-Tabaqat, 4/24, from Ubaydullah bin Musa, in full, and Tirmidhi abridged it, no. 3759, saying, hasan sahih gharib, we do not know it except from the hadith of Israil. It is also in al-Kubra, no. 6977. Hakim graded it sahih, 3/325-326, and Dhahabi agreed with him, but contradicted him in al-Siyar, 2/99, and that is the correct view.Abdul-Ala Thalabi, his status was mentioned earlier, no. 2011.