Sunan Abi Dawud Book 5, Hadith 70
When anything distressed the Prophet (ﷺ), he prayed.
When he was with me he would sleep at dawn. By this she referred to the Prophet (ﷺ).
I used to live with the Messenger of Allah (ﷺ) at night. I would bring water for his ablution and his need. He asked: Ask me. I said: Your company in Paradise. He said: Is there anything other than that ? I said: It is only that. He said: Help me for yourself by making prostrations abundantly.