Musnad Ahmad 25:953

I read to Abd al-Rahman, from Malik, from Abu al-Zubayr al-Makki, from Tawus, from Abdullah ibn Abbas: That the Messenger of Allah, may Allah bless him and grant him peace, when he stood for prayer in the middle of the night, would say: "O Allah, to You is the praise; You are the light of the heavens and the earth and whoever is in them. To You is the praise; You are the sustainer of the heavens and the earth and whoever is in them. To You is the praise; You are the Lord of the heavens and the earth and whoever is in them. To You is the praise; You are the Truth, Your word is the truth, Your promise is the truth, the meeting with You is the truth, Paradise is the truth, the Fire is the truth, and the Hour is the truth. O Allah, to You I have submitted, in You I have believed, upon You I have relied, to You I have turned in repentance, for You I have contended, and to You I have brought my judgment. So forgive me for what I have sent forth and what I have delayed, what I have concealed and what I have declared. You are my God; there is no god but You."