Dua While bowing in prayer (rukooAA)

سُبْحَانَ رَبِّيَ الْعَظِيمِ ⁽¹⁾.

Subhana rabbiyal-AAatheem (three times) ‘How perfect my Lord is, The Supreme.’(three times)

سُبْحَانَكَ اللَّهُمَّ رَبَّنَا وَبِحَمْدِكَ، اللَّهُمَّ اغْفِرْ لِي ⁽¹⁾.

Subhanakal-lahumma rabbana wabihamdik, allahummagh-fir lee ‘How perfect You are O Allah, our Lord and I praise You. O Allah, forgive me.

سُبُّوحٌ قُدُّوسٌ، رَبُّ الْمَلَائِكَةِ وَالرُّوحِ ⁽¹⁾.

Subboohun quddoos, rabbul-mala-ikati warrooh.
‘Perfect and Holy (He is), Lord of the angles and the Rooh (i.e. Jibra-eel).

اللَّهُمَّ لَكَ رَكَعْتُ، وَبِكَ آمَنْتُ، وَلَكَ أَسْلَمْتُ، خَشَعَ لَكَ سَمْعِي، وَبَصَرِي، وَمُخِّي، وَعَظْمِي، وَعَصَبِي، [وَمَا اسْتَقَلَّتْ بِهِ قَدَمِي] ⁽¹⁾.

Allahumma laka rakaAAt, wabika amant, walaka aslamt, khashaAAa laka samAAee, wabasaree, wamukhkhee, waAAathmee, waAAasabee, wamas-taqalla bihi qadamee.
‘O Allah, unto You I have bowed, and in You I have believed, and to You I have submitted. My hearing, sight, mind, bones, tendons and what my feet carry are humbled before You.

سُبْحَانَ ذِي الْجَبَرُوتِ وَالْمَلَكُوتِ وَالْكِبْرِيَاءِ وَالْعَظَمَةِ ⁽¹⁾.

Subhana thil-jabaroot, walmalakoot, walkibriya/, walAAathamah.
‘How perfect He is, The Possessor of total power, sovereignty, magnificence and grandeur.