question #3 Sahih Muslim 1134a, Book 13, Hadith 172 : What does the intention of the Prophet Muhammad (ﷺ) to fast on the 9th of Muharram indicate about his approach to religious practices?

Messenger of Allah, it is a day which the Jews and Christians hold in high esteem. Thereupon the Messenger of Allah (ﷺ) said: When the next year comes, God willing, we would observe fast on the 9th But the Messenger of Allah (ﷺ) died before the advent of the next year.