Sahih Bukhari Volume 007, Book 070, Hadith Number 577.
Narrated By Abu Huraira : I heard Allah's Apostle saying, "The good deeds of any person will not make him enter Paradise." (i.e., None can enter Paradise through his good deeds.) They (the Prophet's companions) said, 'Not even you, O Allah's Apostle?' He said, "Not even myself, unless Allah bestows His favor and mercy on me." So be moderate in your religious deeds and do the deeds that are within your ability: and none of you should wish for death, for if he is a good doer, he may increase his good deeds, and if he is an evil doer, he may repent to Allah."