question #1 Sahih Muslim 400b, Book 4, Hadith 57 : What is the significance of the canal of Kauthar promised to the Prophet Muhammad (ﷺ) in Paradise?

It (Kauthar) is a canal which my Lord the Exalted and the Glorious has promised me in Paradise. There is a tank over it, but he made no mention of the tumblers like the number of the stars.