Musnad Ahmad 1153:668

Muhammad ibn Ja'far narrated to us, he said: Shu'bah narrated to us, from Mansur, from Abu al-Duha, from Masruq, from 'Aishah, that the Messenger of Allah (may Allah bless him and grant him peace) used to frequently say in his bowing (ruku') and his prostration (sujud): "Glory be to You, O Allah, our Lord, and with Your praise. O Allah, forgive me."