Regarding the sacrificial animal, we used to salt some of its meat and bring it to the Prophet ﷺ in Medina. He said, "Do not eat from it for more than three days." This was not a binding command, but rather he wished that we feed others from it. And Allah knows best.
الضحية كنا نملح منه، فنقدم به إلى النبي ﷺ بالمدينة، فقال: لا تأكلوا إلا ثلاثة أيام وليست بعزيمة ولكن أراد أن نطعم منه، والله أعلم.
Bukhari narrated it in "The Book of Sacrifices" (5570), from Ismail bin Abdullah, who said, "My brother told me, from Sulayman, from Yahya bin Saeed, from Amra bint Abdul-Rahman, from Ayesha," and he mentioned it.