It is narrated from one of the Companions of the Prophet (peace and blessings be upon him) (may Allah be pleased with him) that he said: "Perform ablution; ablution is (required) after (eating) all those things that fire has altered (that is, cooked on fire), and also after those things that come out "from between excretion and blood" [Surah al-Nahl: 66]."
This narration indicates that ablution is obligatory after consuming things cooked on fire; however, according to the majority of the hadith scholars and jurists this ruling is abrogated, because the last practice of the Prophet (peace and blessings be upon him) is established as not performing ablution after things cooked on fire. Moreover, rinsing the mouth after drinking milk is Sunnah, not an obligatory ablution.
Hadith Referenceالمطالب العالية بزوائد المسانيد الثمانية / كتاب الطهارة / 126
Hadith Gradingمحدثین:إسناده ضعيف
Hadith Takhrij«حکم الحدیث المطالب العالیہ محققاً تنسیق د. سعد بن ناصر بن عبد العزيز الشَّثري- مکتبہ شاملہ :إسناده ضعيف. » «أورده ابن حجر فى "المطالب العالية"، 126، وأخرجه ابن أبى شيبة فى «مصنفه» برقم: 566، 638، وأخرجه الطحاوي فى «شرح معاني الآثار» برقم: 366»