Sunan Abi Dawud Book 5, Hadith 67
Allah, the Exalted, would awaken the Messenger of Allah (ﷺ) at night. When the dawn came, he would his finish daily round of recital.
The Messenger of Allah (ﷺ) as saying: Our Lord who is blessed and exalted descends every night to the lowest heaven when the last one-third of the night remains, and says: Who supplicated Me so that I may answer him ? Who asks of Me so that I may give to him ? Who asks My forgiveness so that I may forgive him ?
I asked 'Aishah about the prayer of the Messenger of Allah (ﷺ), and I said to her: At what time he prayed at night ? She said: When he heard the cock crow, he got up and prayed.