Sunan Ibn Majah — Establishing the Prayer and the Sunnah Regarding Them — Hadith No: 889
Translation
It was narrated that ‘Aishah said:“The Messenger of Allah (ﷺ) often used to say when bowing and prostrating: ‘Subhanak Allahumma wa bi hamdika, Allahummaghfir li (Glory be to You, O Allah, and praise; O Allah forgive me),’ following the command given by the Qur’an.”[Surat An-Nasr]