question #1 Sahih Muslim 240a, Book 2, Hadith 33 : What is the significance of completing ablution properly in Islam?

I came to ‘A’isha, the wife of the Prophet (ﷺ), on the day when Sa’db. Abi Waqqas died. ‘Abd al-Rahman b. Abu Bakr also came there and he performed ablution in her presence. She (Hadrat ‘A’isha) said: Abd al-Rahman, complete the ablution as I heard the Allah’s Messenger (ﷺ) say: Woe to the heels because of hell-fire.