Oneness, Uniqueness of Allah (Tawheed)
Bukhari :: Book 9 :: Volume 93 :: Hadith 595
Narrated Abu Huraira:
Allah's Apostle said, "Allah said, 'If My slaves loves the meeting with Me, I too love the meeting with him; and if he dislikes the meeting with Me, I too dislike the meeting with him.' " (See Hadith No. 514, Vol. 8)