Sahih Bukhari Volume 001, Book 012, Hadith Number 760.
Narated By 'Aisha : The Prophet used to say in his bowing and prostrations, "Subhanaka-Allahumma Rabbana wa-bihamdika Allahumma-ighfirli.' (I honor Allah from all what (unsuitable things) is ascribed to Him. O Allah Our Lord! And all the praises are for You. O Allah! Forgive me)."