Abu Dawud Book 36, Hadith Number 5066.

Narated By ‘Aisha, Ummul Mu’minin : Shariq al-Hawzani and I came to ‘Aisha (Allah be pleased with her) and asked her: By which (prayer) the Apostle of Allah (PBUH) began when he woke up at night? She replied: You asked me about a thing which no one asked me before. When he woke up at night, he uttered: “Allah is Most Great” ten times, and uttered “Praise be to Allah” ten times, and said “Glory be to Allah and I begin with His praise” ten times, and said: “Glory be to the King, the Most Holy” ten times, and asked Allah’s pardon ten times, and said: “There is no god but Allah” ten times, and then said: “O Allah! I seek refuge in Thee from the strait of the Day of resurrection,” ten times. He then began the prayer.