Sahih Bukhari | Volume 1 | Hadith Number 760

Narrated by 'Aisha
The Prophet used to say in his bowing and prostrations, "Subhanaka-Allahumma Rabbana wa-bihamdika Allahumma-ighfirli.' (I honour 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)."