Sunan Ibn Majah Book 1, Hadith 189

They all heard the Messenger of Allah say: 'Complete the ablution. Woe to the heels because of Hell-fire."

Previous Hadith

"I heard the Messenger of Allah say: 'Woe to the Achilles' tendon because of Hell-fire."

Sunan Ibn Majah Book 1, Hadith 188
Next Hadith

"I saw 'Ali performing ablution and he washed his feet up to the ankles, then he said: 'I wanted to show you how your Prophet purified himself.'"

Sunan Ibn Majah Book 1, Hadith 190