Musannaf Ibn Abi Shayba 21:216

Zayd ibn al-Hubab narrated to us, from Mu'awiyah ibn Salih, he said: Azhar ibn Sa'id narrated to me, from 'Asim ibn Humayd, he said: I asked 'Aishah, "With what did the Messenger of Allah (may Allah bless him and grant him peace) begin the night prayer?" She said: "You have asked me about something that no one before you has asked me about. He would say the takbir ten times, praise Allah ten times, glorify Allah ten times, and seek forgiveness ten times. And he would say: 'O Allah, forgive me, guide me, provide for me, and grant me well-being.' And he would seek refuge from the narrowness of the station on the Day of Resurrection."