Oneness, Uniqueness of Allah (Tawheed)
Bukhari :: Book 9 :: Volume 93 :: Hadith 500
Narrated 'Abdullah:
The Prophet said, "There is none having a greater sense of Ghira than Allah, and for that reason He has forbidden shameful deeds and sins (illegal sexual intercourse etc.) And there is none who likes to be praised more than Allah does." (See Hadith No. 147, Vol. 7)