Musnad Ahmad 30:2962

Waki’ narrated to us, he said: Shu’bah narrated to us, from Muhammad ibn Ziyad, from Abu Hurairah, that he saw a people performing ablution from a water vessel, so he said: "Perform the ablution thoroughly, for I heard Abu al-Qasim (peace and blessings of Allah be upon him) say: 'Woe to the heels from the Fire.'"