219. Dua while prostrating [sujood] #7
The Messenger of Allah (ﷺ) used to say while bowing down and prostration:
سُبُّوحٌ، قُدُّوسٌ، رَبُّ الْمَلَائِكَةِ وَالرُّوحِ
Subboohun, Quddoosun, Rabbul-malaa'ikati warrooh
Translation
Glory (to You), Most Holy (are You), Lord of the angels and the Spirit.
ReferenceSahih (Albani). Abu Dawud: 872