Sunan an Nasai
4433
Sahih+2

It was narrated from 'Abdur'Rahman bin 'Abis that his father said:"I asked 'Aishah about the meat of the sacrificial animals and she said: 'We used to keep the trotters for the Messenger of Allah for a month, then he would eat them

SahihAbu Ghuddah
SahihAl-Albani