question #3 Sahih al-Bukhari 951, Book 13, Hadith 3 : What are the key practices to be observed on the first day of Eid ul Adha according to Islamic tradition?

I heard the Prophet (p.b.u.h) delivering a Khutba saying, “The first thing to be done on this day (first
day of `Id ul Adha) is to pray; and after returning from the prayer we slaughter our sacrifices (in the
name of Allah) and whoever does so, he acted according to our Sunna (traditions).”