It is narrated from Sayyiduna Mu'awiyah bin Haydah (may Allah be pleased with him) that he said: I heard the Messenger of Allah (peace and blessings be upon him) say: "People will be gathered here barefoot, on foot, riding and (dragged) on their faces. You will be presented before Allah with 'al-fidam' (pieces of cloth or seals that prevent speech) upon your mouths, and the first part of any of you to speak on his behalf will be his thigh."