It is narrated from Sayyiduna Abdullah bin Abbas (may Allah be pleased with them both) that the Prophet (peace and blessings be upon him) ate the shoulder of his muhrah (young mare). (The narrator) says: (It) was well cooked. Then he wiped his hand with a cloth and prayed.
Hadith Referenceالمعجم الكبير للطبراني / باب العين / 11688