It is narrated from Abdullah bin Ibrahim Zahri that he saw Hazrat Abu Huraira (may Allah be pleased with him) performing ablution on the roof of the mosque, so he asked him, "With what are you performing ablution?" Abu Huraira (may Allah be pleased with him) replied, "Do you not know why I am performing ablution? I am performing ablution because I ate a piece of cheese, and I heard the Messenger of Allah (peace and blessings be upon him) say: 'Perform ablution after eating something cooked on fire.'"
Hadith Referenceمسند عمر بن عبد العزيز / عمر بن عبد العزيز عن سعيد بن المسيب / 24
Hadith Takhrij«صحيح مسلم ، الحيض ، باب الوضوء مما مست النار: 351»