Hadithcore
Sahih al-Bukhari, 6465
sahih

Narrated `Aisha:

The Prophet (ﷺ) was asked, "What deeds are loved most by Allah?" He said, "The most regular constant deeds even though they may be few." He added, 'Don't take upon yourselves, except the deeds which are within your ability."

حَدَّثَنِي مُحَمَّدُ بْنُ عَرْعَرَةَ، حَدَّثَنَا شُعْبَةُ، عَنْ سَعْدِ بْنِ إِبْرَاهِيمَ، عَنْ أَبِي سَلَمَةَ، عَنْ عَائِشَةَ ـ رضى الله عنها ـ أَنَّهَا قَالَتْ سُئِلَ النَّبِيُّ صلى الله عليه وسلم أَىُّ الأَعْمَالِ أَحَبُّ إِلَى اللَّهِ قَالَ ‏"‏ أَدْوَمُهَا وَإِنْ قَلَّ ‏"‏‏.‏ وَقَالَ ‏"‏ اكْلَفُوا مِنَ الأَعْمَالِ مَا تُطِيقُونَ ‏"‏‏.‏

References2 variants
In-Book Reference
Book 81, Hadith 54
USC-MSA web (English) reference
Vol. 8, Book 76, Hadith 472 (deprecated numbering scheme)