(139) باب التَّسْبِيحِ وَالدُّعَاءِ فِي السُّجُودِ
Narrated `Aisha:
The Prophet (ﷺ) used to say frequently in his bowing and prostrations "Subhanaka l-lahumma Rabbana wa bihamdika, Allahumma ghfir li" (Exalted [from unbecoming attributes] Are you O Allah our Lord, and by Your praise [do I exalt you]. O Allah! Forgive me). In this way [??] he was acting on what was explained to him in the Holy Qur'an.
Reference: Sahih al-Bukhari 817
In-book reference: Book 10, Hadith 212
USC-MSA web (English) reference(deprecated numbering scheme): Vol. 1, Book 12, Hadith 781