Narrated Abu Salih:
"I asked 'Aishah and Umm Salamah about which deed did the Messenger of Allah (ﷺ) like to do most. They said: 'Whatever he could do regularly, even if it was little.'" (RU)
English reference (RU): Vol. 5, Book 41, Hadith 2856 (RU)
Arabic reference (RU): Book 43, Hadith 3094 (RU)