It is narrated from Abu al-Tufayl Amir bin Wathilah that he said: I heard Sayyiduna Ali (may Allah be pleased with him) stand up and say: "Ask me before you are unable to ask, for after me you will not be able to ask anyone like me." At this Ibn al-Kawwa' stood up and asked: "Who are those about whom Allah has said: 'Those who exchanged the favour of Allah for disbelief and settled their people in the home of ruin' [Surah Ibrahim: 28] ?" Sayyiduna Ali (may Allah be pleased with him) said: "They are the hypocrites of Quraysh." Then he asked: "And who are those about whom He said: 'Those whose effort is lost in the life of this world while they think that they are doing well in their deeds' [Surah al-Kahf: 104] ?" Sayyiduna Ali (may Allah be pleased with him) said: "The people of Harura' (the Khawarij) are among them." This hadith is sahih (authentic) with a high ('ali) chain, and Bassam bin Abd al-Rahman al-Sayrafi is one of the trustworthy narrators of Kufah whose hadiths are collected, but the two Shaykhs (Bukhari and Muslim) did not record it.