Reference : Hisn al-Muslim 37

سُبْـحانَ ذي الْجَبَـروت، والمَلَـكوت، وَالكِبْـرِياء، وَالْعَظَـمَةِ
Subḥāna dhil-jabarūti, walmalakūti, walkibriyā'i, wal`aẓamati.

Glory is to You, Master of power, of dominion, of majesty and greatness.

Reference:
Abu Dawud 1/230, An-Nasa'i and Ahmad. Its chain of narration is good 
(Hasan).

Chapter: While bowing in prayer