(17) باب لَنْ يَدْخُلَ أَحَدٌ الْجَنَّةَ بِعَمَلِهِ بَلْ بِرَحْمَةِ اللَّهِ تَعَالَى
A'isha, the wife of Allah's Apostle (ﷺ), reported that Allah's Messenger (ﷺ) used to say:
Observe moderation (in doing deeds), and if you fail to observe it perfectly, try to do as much as you can do (to live up to this ideal of moderation) and be happy for none would be able to get into Paradise because of his deeds alone. They (the Companions of the Holy Prophet) said: Allah's Messenger, not even you? Thereupon he said: Not even I, but that Allah wraps me in His Mercy, and bear this in mind that the deed loved most by Allah is one which is done constantly even though it is small.
Reference: Sahih Muslim 2818 a
In-book reference: Book 52, Hadith 75
USC-MSA web (English) reference(deprecated numbering scheme): Book 39, Hadith 6770