Ka'b b. ‘Ujra reported God’s Messenger as saying, “There are certain remembrances the repeaters (or, performers)* of which after every prescribed prayer will never be caused disappointment:
‘Glory be to God’ thirty-three times, ‘Praise be to God’ thirty-three times, and ‘God is most great’ thirty-four times.”
* The transmitter gives this alternative, thus showing that he is not sure which word was used.
Muslim transmitted it.