question #1 Sahih Muslim 754a, Book 6, Hadith 193 : What is the significance of performing the Witr prayer in Islam?

Observe Witr prayer before it is morning. Abu Sa’id reported that they (the Prophet’s Companions) asked the Messenger of Allah (ﷺ) about Witr (prayer). (In reply to their inquiry) he said: Observe Witr prayer before it is morning.