"I saw Abu Hurairah performing Wudu' on the roof of the Masjid ans he said: 'I ate some tough cheese, so I performed Wudu' because of that. I heard the Messenger of Allah (ﷺ) commanding us to do Wudu' from that which has been touched by fire.'"
Sunan an-Nasa'i Book 1, Hadith 174
← Previous Hadith "I heard the Messenger of Allah (ﷺ) say: 'Perform Wudu' from that which has been touched by fire.'"

Sunan an-Nasa'i Book 1, Hadith 173 Next Hadith → "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.'"

Sunan an-Nasa'i Book 1, Hadith 175