It is narrated from Sayyiduna Anas bin Malik (may Allah be pleased with him) that he used to perform ablution after consuming things that fire had altered (by cooking), and he would also mention: "Sayyiduna Abu Talhah (may Allah be pleased with him) also performed ablution after eating something that fire had altered (that is, cooked)."
The chain of this report (athar) is sahih (authentic), and it is understood to refer to the early ruling of ablution after eating things cooked by fire, which was later abrogated.
Hadith Referenceالمطالب العالية بزوائد المسانيد الثمانية / كتاب الطهارة / 124
Hadith Gradingمحدثین:إسناده صحيح، موقوف
Hadith Takhrij«حکم الحدیث المطالب العالیہ محققاً تنسیق د. سعد بن ناصر بن عبد العزيز الشَّثري- مکتبہ شاملہ :موقوف، إسناده صحيح لغيره. » «أورده ابن حجر فى "المطالب العالية"، 124، وأخرجه ابن أبى شيبة فى «مصنفه» برقم: 562»