Hazrat Abu Salamah bin Abdur Rahman, Abu Bakr bin Sulaiman, Saeed bin Musayyib, and Ata bin Yasar (may Allah have mercy on them) were asked, and all of them said: "There is no harm in the milk of a stallion (male animal)."
Hadith Referenceسنن سعید بن منصور / كتاب النكاح / 2165