Musnad Ahmad 31:366

An-Nadr ibn Isma'il Abu al-Mughirah al-Qass narrated to us, al-A'mash narrated to us, from 'Atiyyah, from Abu Sa'id, who said: The Messenger of Allah (peace and blessings of Allah be upon him) said: "While a man among those who were before you went out wearing two green garments, strutting in them, Allah commanded the earth, so it seized him. And he is sinking down into it until the Day of Resurrection."