Sahih Muslim

Sa'id b. Musayyib explained"" al-bahira"" as that animal which is not milked but for the idols. and none amongst the people milks them, and"" as-sa'iba"" as that animal which is let loose for the deities. Nothing is loaded over it, and Ibn Musayyib narrated that Abu Huraira stated that Allah's Messenger (ﷺ) said:I saw 'Amr b. 'Amir al-Khuzili dragging his intestines in fire and he was the first who devoted animals to deity