The Messenger of Allah (ﷺ) used to say while bowing down and prostration:
سُبُّوحٌ، قُدُّوسٌ، رَبُّ الْمَلَائِكَةِ وَالرُّوحِ
Pronunciation
Subboohun, Quddoosun, Rabbul-malaa'ikati warrooh
Meaning
Glory (to You), Most Holy (are You), Lord of the angels and the Spirit.
Source: Sahih (Albani). Abu Dawud: 872
Read the hadith
حَدَّثَنَا مُسْلِمُ بْنُ إِبْرَاهِيمَ، حَدَّثَنَا هِشَامٌ، حَدَّثَنَا قَتَادَةُ، عَنْ مُطَرِّفٍ، عَنْ عَائِشَةَ، أَنَّ النَّبِيَّ صلى الله عليه وسلم كَانَ يَقُولُ فِي رُكُوعِهِ وَسُجُودِهِ " سُبُّوحٌ قُدُّوسٌ رَبُّ الْمَلاَئِكَةِ وَالرُّوحِ " . ‘
Aishah said that the prophet (ﷺ) used to say when bowing and prostrating, “All-Glorious, All-Holy, Lord of the angels and spirit. [Sahih (Albani). Abu Dawud: 872]
Duas from IslamicAPI's Masnun Dua dataset (based on the Quran, hadith, Hisnul Muslim and Rahe Belayat). See the dataset