The most beloved action to Messenger of Allah ﷺ was that whose doer did it continuously and regularly.  

أَنَّهَا قَالَتْ كَانَ أَحَبُّ الْعَمَلِ إِلَى رَسُولِ اللَّهِ ﷺ الَّذِي يَدُومُ عَلَيْهِ صَاحِبُهُ  

Yahya related to me from Malik from Hisham ibn Urwa from his father that A'isha, the wife of the Prophet ﷺ said, "The actions which the Messenger of Allah ﷺ loved most were those which were done most constantly."  

عَنْ عَائِشَةَ زَوْجِ النَّبِيِّ ﷺ أَنَّهَا قَالَتْ كَانَ أَحَبُّ الْعَمَلِ إِلَى رَسُولِ اللَّهِ ﷺ الَّذِي يَدُومُ عَلَيْهِ صَاحِبُهُ  

[Machine] The Messenger of Allah ﷺ loved the act of charity, as long as it was available to him, even if it was little.  

كَانَ أَحَبُّ الْعَمَلِ إِلَى رَسُولِ اللهِ ﷺ مَا دَامَ عَلَيْهِ وَإِنْ قَلَّ  

The most beloved action to Messenger of Allah ﷺ was that whose doer did it continuously and regularly. (Using translation from Bukhārī 6462)  

أَنَّهَا قَالَتْ كَانَ أَحَبُّ الْعَمَلِ إِلَى رَسُولِ اللهِ ﷺ الَّذِي يَدُومُ عَلَيْهِ صَاحِبُهُ  

The most beloved action to Messenger of Allah ﷺ was that whose doer did it continuously and regularly. (Using translation from Bukhārī 6462)  

أَنَّهَا قَالَتْ «كَانَ أَحَبُّ الْأَعْمَالِ إِلَى رَسُولِ اللَّهِ ﷺ الَّذِي يَدُومُ عَلَيْهِ صَاحِبُهُ»  

[Machine] "The most beloved deeds to the Prophet Muhammad ﷺ were those done consistently, even if they were few."  

«كَانَ أَحَبُّ الْأَعْمَالِ إِلَى رَسُولِ اللهِ ﷺ مَا دِيمَ عَلَيْهِ وَإِنْ قَلَّ»  

[Machine] "He (the Prophet Muhammad) did not die until his most preferred form of worship was sitting in prayer, and the action that was most beloved to him was consistency in it, even if it was little."  

«مَا مَاتَ حَتَّى كَانَ أَكْثَرُ صَلَاتِهِ قَاعِدًا وَكَانَ أَحَبُّ الْعَمَلِ إِلَيْهِ مَا دَاوَمَ عَلَيْهِ صَاحِبُهُ وَإِنْ قَلَّ» تَعْنِي النَّبِيَّ ﷺ  

[Machine] The actions most beloved to the Messenger of Allah ﷺ are those that are consistent, even if they are few.  

أَحَبُّ الْأَعْمَالِ إِلَى رَسُولِ اللَّهِ ﷺ مَا دِيمَ عَلَيْهِ وَإِنْ قَلَّ  

"خُذُوا مِنَ الْعَمَلِ مَا تُطِيقُونَ؛ فَإنَّ اللَّه لَا يَمَلُّ حتى تَمَلّوا (وَأَحَبُّ الأَعْمَال إِلى اللَّه ما دَاوَمَ عليه صَاحِبُهُ، وَإِنْ قَلَّ).  

That which is done continuously, even if it is small. (Using translation from Muslim 782b)   

"أحبُّ الأعمالِ إلى اللهِ أدَوَمُها وإن قلَّ".