سُبْحَانَكَ اَللَّهُمَّ رَبَّنَا وَبِحَمْدِكَ، اَللَّهُمَّ اغْفِرْ لِي

Subhaanaka Allaahumma Rabbanaa wa bihamdika Allahum-maghfir lee

Glory is to You, O Allah, our Lord, and praise is Yours. O Allah, forgive me. [1] Narrated from Aisha (RA), she said that according to the instructions of the Qur'an, [2] the Messenger of Allah (ﷺ) used to say this dua more and more in bowing down and prostration - (The dua is mentioned above)

Reference: [1] Bukhari: 794 [2] Sura Nasr 110:3