Ja'far bin 'Amr bin Umayya جعفر بن عمرو بن أمية · The Book of Menstruation

I saw the Messenger of Allah (ﷺ) take slices from goat's shoulder, and then eat them, and then offer prayer without having performed ablution.

I saw the Messenger of Allah (ﷺ) take slices from goat's shoulder and then eat them. He was called for prayer and he got'up, leaving aside the knife, and offered prayer but did not perform ablution.