Narrated 'Aisha (Radi-Allahu 'anha):

Allah's Apostle (Sallallahu 'Alaihi Wa Sallam) said, "Do good deeds
properly, sincerely and moderately and know that your deeds alone will not
make you enter Paradise, and that the most beloved deed to Allah is the
most regular and constant even though it were little."

Bukhari Vol. 8 : No. 471