Reference : Hisn al-Muslim 43

سُبـّوحٌ قُـدّوس، رَبُّ الملائِكَـةِ وَالـرُّوح
Subbūḥun, Quddūsun, Rabbu ‘l-malā'ikati warrūḥ.


Glory (to You), Most Holy (are You), Lord of the angels and the Spirit.

Reference:
Muslim 1/533, see invocation no. 35 above.

Chapter: While prostrating