Sahih Muslim Book 39, Hadith Number 6761.

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: There is none whose deeds alone would entitle him to get into Paradise. It was said to him: And, Allah’s Messenger, not even you? Thereupon he said: Not even I, but that my Lord wraps me in Mercy.