Umm al-Mu’minin Aisha Siddiqa (may Allah be pleased with her) narrates that the Messenger of Allah (peace and blessings be upon him) said:“Whoever is called to account on the Day of Resurrection will be ruined.”(The rest of the hadith has already been mentioned in the Book of Knowledge, under the chapter: Whoever heard something and did not understand it, then asked again so that he might understand...)