question #1 Sahih al-Bukhari 1137, Book 19, Hadith 18 : How is the night prayer structured according to the teachings of the Prophet Muhammad (ﷺ)?

A man said, “O Allah’s Messenger (ﷺ)! How is the prayer of the night?” He said, “Two rak`at followed by
two rak`at and so on, and when you apprehend the approaching dawn, offer one rak`a as witr.”