Sahih Muslim | Book 3 | Hadith Number 687

Narrated by 'Abdullah b. Ibrahim b. Qariz
'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 (may peace be upon him) say: Perform ablution (after eating anything) touched by fire.