From his father who said that he saw the Prophet (ﷺ) making incisions (with a knife) into a piece of a lamb shoulder which he ate from, then he went to perform Salat without performing Wudu'.

This Hadith is Hasan Sahih and there is something on this topic from Al-Mughirah bin Shu'bah.
Jami` at-Tirmidhi Book 25, Hadith 52
← Previous Hadith "My father had me married so he invited people, and Safwan bin Umayyah was among them. So he said: 'Indeed the Messenger of Allah (ﷺ) said: 'Bite the meat (with your teeth) for indeed it is more enjoyable and more wholesome.

He said: There are narration on this topic from 'Aishah and Abu Hurairah.

We do not know of this Hadith except through the narration of 'Abdul-Karim. Some of the people of knowledge have criticized 'Abdul-Karim Al-Mu'allim because of his memory, Ayyub As-Sakhtiyani was among them.

Jami` at-Tirmidhi Book 25, Hadith 51 Next Hadith → "Some meat was brought to the Prophet (ﷺ) and a foreleg was presented to him, and he used to like it, so he bit from it."

He said: There are narrations on this topic from Ibn Mas'ud, 'Aishah, 'Abdullah bin Ja'far, and Abu 'Ubaidah.

This Hadith is Hasan Sahih. Abu Hayyan's (a narrator in the chain) name is Yahya bin Sa'eed bin Hayyan At-Taimi. Abu Zur'ah bin 'Amr bin Jarir's name is Harim.

Jami` at-Tirmidhi Book 25, Hadith 53