question #3 Sahih Muslim 722, Book 6, Hadith 105 : What is the significance of the Witr prayer in a Muslim’s daily worship?

My Friend (ﷺ) instructed me in three (acts), and I would never abandon them as long as I live. (And these three things are): Three fasts during every month, the forenoon prayer, and this that I should not sleep till I have observed the Witr prayer.