Sahih Muslim Book 39, Hadith Number 6760.

Chapter : None would attain salvation because of his deeds but it is through Lord’s Mercy (that he would attain that).

Abu Huraira reported Allah’s Messenger (may peace be upon him) as saying: None amongst you would attain salvation purely because of his deeds. A person said: Allah’s Messenger, even you also. Thereupon he said: Yes. Not even I, but that Allah wraps me in Mercy, but you should act with moderation. This hadith has been transmitted on the authority of Bukair b. al-Ashajj with a slight variation of wording.