Sayyiduna Abdullah bin Amr (may Allah be pleased with him) narrates: We were returning with the Prophet (peace and blessings of Allah be upon him) from Makkah to Madinah. On the way, at a certain place, some people hurried ahead at the time of Asr prayer. In their haste, they began to perform ablution quickly. Sayyiduna Abdullah narrates: When we reached those people, their (heels) were dry and shining, water had not touched them. So the Prophet (peace and blessings of Allah be upon him) said: Woe to these heels from the Hellfire! Perform ablution thoroughly.