The Messenger of Allah ﷺ said, "Perform ablution after eating anything touched by fire, even if it be from a small pot of dried curd."
حدثنا يزيد أخبرنا محمد عن أبي سلمة
قال رسول الله ﷺ توضئوا مما مست النار ولو من تور أقط
Its isnad is sahih. It was mentioned previously in 10156.