Oneness, Uniqueness of Allah (Tawheed) 
Bukhari :: Book 9 :: Volume 93 :: Hadith 496
Narrated Anas:
The Prophet slaughtered two rams as sacrifice and mentioned Allah's Name and said, "Allahu-Akbar" while slaughtering).
Oneness, Uniqueness of Allah (Tawheed)
Bukhari :: Book 9 :: Volume 93 :: Hadith 496
Narrated Anas:
The Prophet slaughtered two rams as sacrifice and mentioned Allah's Name and said, "Allahu-Akbar" while slaughtering).