Sayyiduna Asim al-Laythi (may Allah be pleased with him), the father of Bishr bin Asim al-Laythi, narrated: I entered the mosque of Madinah and saw that people were saying: We seek refuge with Allah from the wrath of Allah and the wrath of His Messenger (peace and blessings be upon him). He said: I asked: Why did they say that? The Messenger of Allah (peace and blessings be upon him) was delivering a sermon on his pulpit when a man stood up, took his son by the hand and led him out of the mosque, so the Messenger of Allah (peace and blessings be upon him) said: "May Allah curse both the one who leads and the one who is led. A day of great ruin will come upon this Ummah because of so-and-so, the one with the large buttocks."
Hadith Referenceالمعجم الكبير للطبراني / باب العين / 14537