Sahih al-Bukhari
Book 73: Al-Adha Festival Sacrifice (Adaahi)
كتاب الأضاحي
30 hadith in this book
Chapter 14 To say Takbir while slaughtering
باب التَّكْبِيرِ عِنْدَ الذَّبْحِ
Narrated Anas:
The Prophet (ﷺ) offered as sacrifices, two horned rams, black and white in color. He slaughtered them with his own hands and mentioned Allah's Name over them and said Takbir and put his foot on their sides.
حَدَّثَنَا قُتَيْبَةُ، حَدَّثَنَا أَبُو عَوَانَةَ، عَنْ قَتَادَةَ، عَنْ أَنَسٍ، قَالَ ضَحَّى النَّبِيُّ صلى الله عليه وسلم بِكَبْشَيْنِ أَمْلَحَيْنِ أَقْرَنَيْنِ، ذَبَحَهُمَا بِيَدِهِ، وَسَمَّى وَكَبَّرَ وَوَضَعَ رِجْلَهُ عَلَى صِفَاحِهِمَا.
Hadith text, translations and grading are courtesy of Sunnah.com.