Abu Dawud Book 2, Hadith Number 1425.
Chapter : Supplications after the witr prayer.
Narated By Ubayy ibn Ka’b : When the Apostle of Allah (PBUH) offered salutation in the witr prayer, he said: Glorify be to the king most holy.
Narated By Ubayy ibn Ka’b : When the Apostle of Allah (PBUH) offered salutation in the witr prayer, he said: Glorify be to the king most holy.