What to say immediately following the Witr prayer

1. سُبْحَانَ المَلِكِ القُدُّوسِ. وَالثَّالِثَةُ يَجْهَرُ بِهَا وَيَمُدُّ بِهَا صَوْتَهُ يَقُولُ: [رَبِّ المَلَائِكَةِ وَالرُّوحِ]

   (How perfect The King, The Holy One is.(three times) on the third time he would raise his voice, elongate it and add: (Lord of the angles and the Rooh (i.e. Jibra-eel).))

Fortress of the Muslim (Hisn al-Muslim), Sa'id al-Qahtani.