question #1 Sahih Muslim 640b, Book 5, Hadith 282 : What can be inferred about the Prophet’s habits regarding the timing of his prayers?

We waited for the Messenger of Allah (may peace be upon hi n) one night, till it was about midnight. He (the Holy Prophet) came and observed prayer and then turned his face towards us, as it I was seeing the lustre of the silver ring on his finger.