Musnad Ahmad 30:512

'Abd al-Razzaq narrated to us, Ma'mar informed us, from Muhammad ibn Ziyad, the freed slave of Banu Jumah, that he heard Abu Hurayrah saying: The Messenger of Allah (peace and blessings of Allah be upon him) said: "While a man was strutting in a garment, admiring his hair, and having let his lower garment hang down, Allah caused the earth to swallow him up. He will continue to sink—or he said: fall—in it until the Day of Resurrection."