Sunan an-Nasa'i 187
سنن النسائي#187SahihThe Apostle (ﷺ) took milk and then called for water and rinsed (his mouth) and said:It contains greasiness
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Abu GhuddahSahih
Al-AlbaniSahih
Zubair Ali ZaiSahih - Agreed Upon
In-book reference: 1:188