al-Muttalib bin 'Abdullah bin Hantab المطلب بن عبد الله بن حنطب · The Book of Purification

Al-Muttalib bin 'Abdullah bin Hantab (narrated) that 'Abdullah bin 'Umar performed Wudu', washing each part of the body three times, and he attributed that to the Prophet (ﷺ).

"Should I perform Wudu' after eating food that I see in the Book of Allah is permissible because fire has touched it?" Abu Hurairah gathered some pebbles and said: "I bear witness (as many times as) the number of these pebbles, that the Messenger of Allah (ﷺ) said: 'Perform Wudu' from that which has been touched by fire.'"