كتاب صفة القيامة والجنة والنار
52
Characteristics of the Day of Judgment, Paradise, and Hell
(17)
Chapter: No One Will Enter Paradise By Virtue Of His Deeds, Rather By The Mercy Of Allah, Exalted Is He
(17)
باب لَنْ يَدْخُلَ أَحَدٌ الْجَنَّةَ بِعَمَلِهِ بَلْ بِرَحْمَةِ اللَّهِ تَعَالَى ‏‏

Jabir reported:

I heard Allah's Apoetle (ﷺ) as saying: None of you would get into Paradise because of his good deeds alone, and he would not be rescued from Fire, not even I, but because of the Mercy of Allah.
حَدَّثَنِي سَلَمَةُ بْنُ شَبِيبٍ، حَدَّثَنَا الْحَسَنُ بْنُ أَعْيَنَ، حَدَّثَنَا مَعْقِلٌ، عَنْ أَبِي الزُّبَيْرِ، عَنْ جَابِرٍ، قَالَ سَمِعْتُ النَّبِيَّ صلى الله عليه وسلم يَقُولُ ‏ "‏ لاَ يُدْخِلُ أَحَدًا مِنْكُمْ عَمَلُهُ الْجَنَّةَ وَلاَ يُجِيرُهُ مِنَ النَّارِ وَلاَ أَنَا إِلاَّ بِرَحْمَةٍ مِنَ اللَّهِ ‏"‏ ‏.‏
Reference : Sahih Muslim 2817 c
In-book reference : Book 52, Hadith 74
USC-MSA web (English) reference : Book 39, Hadith 6769
  (deprecated numbering scheme)