Oneness, Uniqueness of Allah (Tawheed)

Bukhari :: Book 9 :: Volume 93 :: Hadith 579

Narrated Abu Dharr:

The Prophet said, Gabriel came to me and gave me the glad tidings that anyone who died without worshipping anything besides Allah, would enter Paradise. I asked (Gabriel), 'Even if he committed theft, and even if he committed illegal sexual intercourse?' He said, '(Yes), even if he committed theft, and even if he Committed illegal sexual intercourse."