Sunan Ibn Majah 450
سنن ابن ماجه#450SahihAbdullah bin 'Amr said:"The Messenger of Allah saw some people performing ablution, and their heels were dry. He said: 'Woe to the heels because of Hell-fire, perform ablution properly
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Al-AlbaniSahih
Muhammad Fouad Abd al-BaqiSahih
Zubair Ali ZaiSahih Muslim
In-book reference: 1:184