question #3 Sahih al-Bukhari 6018, Book 78, Hadith 49 : What is the significance of speaking good or remaining silent in the context of faith in Allah and the Last Day?

Allah’s Messenger (ﷺ) said, “Anybody who believes in Allah and the Last Day should not harm his neighbor,
and anybody who believes in Allah and the Last Day should entertain his guest generously and
anybody who believes in Allah and the Last Day should talk what is good or keep quiet. (i.e. abstain
from all kinds of evil and dirty talk).