Yahya (RA) related to me from Malik from Sumayy, the mawla of Abu Bakr
(RA), from Abu Salih as-Samman from Abu Hurayra (RA): The Messenger of
Allah (peace be upon him) said: “Whoever says, ‘Glory be to Allah and
with His praise’ (Subhana’llah wa bi-hamdihi) one hundred times in a day
will have his wrong actions taken away from him, even if they are as
abundant as the foam on the sea.”
(Muwatta Malik, Book 15, Hadith 21)