Sunan Abi Dawud Book 5, Hadith 68

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.

Previous Hadith

Allah, the Exalted, would awaken the Messenger of Allah (ﷺ) at night. When the dawn came, he would his finish daily round of recital.

Sunan Abi Dawud Book 5, Hadith 67
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When he was with me he would sleep at dawn. By this she referred to the Prophet (ﷺ).

Sunan Abi Dawud Book 5, Hadith 69