Zaid b Thabit reported
I heard the Messenger of Allah (ﷺ) say this: Ablution is obligatory (for one who takes anything) touched by fire.
'Abdullah b. Ibrahim b. Qariz reported that he found Abu Huraira performing ablution in the mosque, who said
I am performing ablution because of having eaten pieces of cheese, for I heard the Messenger of Allah (ﷺ) say: Perform ablution (after eating anything) touched by fire.
'Urwa reported on the authority of'A'isha, the wife of the Messenger of Allah (ﷺ), saying this
The Messenger of Allah (ﷺ) said. Perform ablution (after eating) anything touched by fire.