Ibn ‘Abbas reported God’s Messenger as saying, “I have been prohibited to recite the Qur’an when bowing or prostrating myself; so when bowing magnify the Lord, and when prostrating yourselves be earnest in supplication, for it is fitting that your supplications should be answered.’’
Narrated Abu Huraira reported God’s Messenger as saying:
When the imam says, “God listens to him who praises Him," say, “O God, our Lord, to Thee be the praise for if what anyone says synchronises with what the angels say, he will be forgiven his past sins.
‘A’isha told how the Prophet often said while bowing and prostrating himself, “Glory be to Thee, O God, our Lord, and praise be to Thee. O God, forgive me," thus complying with the the Qur’an (Al-Qur’an; 110-3).