Perform Wudo after eating food that has been touched by fire.

This hadith highlights the importance of performing wudu after eating something that has been touched by fire. It was narrated by 'Abdullah bin Ibrahim bin Qariz, who saw Abu Hurairah performing wudu on the roof of a masjid and heard him say he did so because he ate some tough cheese which had been touched by fire. This shows us that even if we eat something small, we should still perform wudu afterwards as it is a command from Allah's Messenger. Performing wudu helps us to stay clean and pure in our faith and practice, which is why it is important to do so even when we have eaten something small like cheese or bread that has been cooked over a flame. We should also remember to be mindful of what we eat and how it was prepared, as this will help us stay true to our faith and practice in Islam.