The Messenger of Allah ﷺ gnawed meat from a shoulder bone, then stood up and prayed without performing ablution.
حدثنا يونس حدثنا حماد يعني ابن زيد عن أيوب عن محمد بن سيرين أن
إن رسول الله ﷺ تعرق كتفا ثم قام فصلى ولم يتوضأ
Its isnad is sahih, see 2002, 2153. This isnad is evidence for us in establishing the soundness of Ibn Sirin's narration from Ibn Abbas. We already responded in 1852 to the claim that he did not hear from him, for here it is, from Ibn Sirin with a sahih isnad, that Ibn Abbas related to him.