question #1 Sahih Muslim 376c, Book 3, Hadith 156 : What is the significance of maintaining ablution before prayer in Islamic practice?

I heard Anas as saying that the Companion of the Messenger of Allah (ﷺ) dozed off and then offered prayer and did not perform ablution. He (the narrator) said: I asked him if he had actually heard it from Anas. He said: By Allah. yes.