´It was narrated that Anas bin Malik said:` "The Messenger of Allah milked a sheep and drank some of its milk, then he called for water and rinsed his mouth and said: 'It has some greasiness in it.'"
Hadith ReferenceSunan Ibn Majah / The Book of Purification and its Sunnah / Hadith: 501
Hadith Gradingالألبانی:ضعيف | زبیر علی زئی:ضعيف, إسناده ضعيف, زمعة بن صالح: ضعيف وضعفه الجمهور كما قال البوصيري, انوار الصحيفه، صفحه نمبر 395