Sunan Abi Dawud Book 28, Hadith 50
The Messenger of Allah (ﷺ) prohibited eating the animal which feeds on filth and drinking its milk.
A man asked the Messenger of Allah (ﷺ): Is there any food from which I should keep myself away? I heard the Messenger of Allah (ﷺ) say: Anything which creates doubt should not occur in your mind by which you resemble Christianity.
The Prophet (ﷺ) prohibited to drink the milk of the animal which feeds on filth.