Sahih al-Bukhari #951 · The Two Festivals (Eids)

Sahih al-BukhariAl-Bara
Sahih al-Bukhari · Book 13 · The Two Festivals (Eids)
Sahih al-Bukhari · كتاب 13 · كتاب العيدين
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)
حَدَّثَنَا حَجَّاجٌ، قَالَ حَدَّثَنَا شُعْبَةُ، قَالَ أَخْبَرَنِي زُبَيْدٌ، قَالَ سَمِعْتُ الشَّعْبِيَّ، عَنِ الْبَرَاءِ، قَالَ سَمِعْتُ النَّبِيَّ صلى الله عليه وسلم يَخْطُبُ فَقَالَ ‏
"‏ إِنَّ أَوَّلَ مَا نَبْدَأُ مِنْ يَوْمِنَا هَذَا أَنْ نُصَلِّيَ، ثُمَّ نَرْجِعَ فَنَنْحَرَ، فَمَنْ فَعَلَ فَقَدْ أَصَابَ سُنَّتَنَا ‏"‏‏.‏
Reference : Sahih al-Bukhari 951In-book reference : Book 13, Hadith 3