Ayesha and Umm Salama were asked which deed was most beloved to the Prophet ﷺ. They replied, "That which is consistent, even if it is small."
حدثنا محمد بن فضيل قال حدثنا الأعمش
سئلت عائشة وأم سلمة أي العمل كان أعجب إلى النبي ﷺ قالتا ما دام وإن قل
Its isnad is sahih. Abu Salih is al-Samman, whose name was Zakwan al-Madani, one of the well-known leading successors. His hadith is found in all six major collections. Bukhari transmitted it, 1/101, no. 43, Fath, in the Book of Faith, as did Muslim, 1/511, no. 741, in the Book of Travelers, Nasai, 3/308, no. 1616, Ibn Majah, 1/387, no. 1225, and Malik, 1/174, in the chapter on shortening the prayer.