Sahih Muslim
The Book Giving Description of the Day of Judgement, Paradise and Hell (Kitab Sifat Al-Qiyamah wal Janna wan-Nar)
Book Number: 039 / Hadith Number: 6761
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.