Oneness, Uniqueness of Allah (Tawheed) 
Bukhari :: Book 9 :: Volume 93 :: Hadith 498
Narrated Ibn 'Umar:
The Prophet said, "Do not swear by your fathers; and whoever wants to swear should swear by Allah."
Oneness, Uniqueness of Allah (Tawheed)
Bukhari :: Book 9 :: Volume 93 :: Hadith 498
Narrated Ibn 'Umar:
The Prophet said, "Do not swear by your fathers; and whoever wants to swear should swear by Allah."