Musnad Ahmad 31:363

Mu'awiyah ibn Hisham narrated to us, Shayban narrated to us, from Firas, from 'Atiyyah, from Abu Sa'id, from the Messenger of Allah, peace and blessings of Allah be upon him, who said: "While a man was walking, wearing two garments, acting arrogantly, Allah caused the earth to swallow him up. He is sinking down into it until the Day of Resurrection."