question #3 Sahih Muslim 699f, Book 6, Hadith 40 : What is the significance of the Mu’adhdhin’s role in communicating changes to prayer arrangements?

A hadith like this that Ibn ‘Abbas ordered his Mu’adhdhin (to summon people to prayer and then make announcement to say prayer in their houses) on Friday which was a rainy day, has been transmitted by ‘Abdullah b. Harith. Wuhaib, however, says that he did not hear it from him.