Musnad Ahmad 33:1109

Husayn narrated to us, Yazid ibn 'Ata' narrated to us, from Abu Ishaq, from Sa'id ibn Abi Karb and 'Abdullah ibn Marthad, from Jabir ibn 'Abdullah, who said: I heard the Messenger of Allah, peace and blessings of Allah be upon him, saying: "Woe to the heels from the Fire."