It is narrated from Ubaydullah bin Abi Mulaykah that a man from the people of Sham came and reviled Sayyiduna Ali (may Allah be pleased with him) in the presence of Sayyiduna Abdullah bin Abbas (may Allah be pleased with them both). Ibn Abbas (may Allah be pleased with them both) pelted him with pebbles and said: "O enemy of Allah! You have hurt the Messenger of Allah (peace and blessings be upon him). (Allah Almighty says:) 'Indeed, those who hurt Allah and His Messenger, Allah has cursed them in this world and the Hereafter and has prepared for them a humiliating punishment' [Surah al-Ahzab: 57] . Had the Messenger of Allah (peace and blessings be upon him) been (alive), you would certainly have hurt him." This hadith has an authentic chain (sahih al-isnad), but the two Shaykhs did not record it.