سُـبْحانَ المَلِكِ القُدّوس (ثلاث مرات)
Subhanal-malikil-quddoos (three times)
Translation
How perfect The King, The Holy One is. (three times)
When to recite
Recited three times after the Witr prayer. On the third time the voice is raised and elongated.
Source / Reference
Abu Dawud 2/89, An-Nasa'i 3/244