Uthmān ibn Abī Shayba related to us; Jarīr ibn Abd al-Hamīd related to us, from al-Amash, from Amr ibn Murra, from Yūsuf ibn Māhak, from Ubayd ibn Umayr, from Aisha—may Allah be pleased with her—who said: The Messenger of Allah—may Allah bless him and grant him peace—said: “The two people guilty of the gravest falsehood are a poet who lampoons an entire tribe and a man who repudiates his own father.”