Encouragement to honor one's neighbor and guest, and the obligation to remain silent unless one has something good to say, and the fact that all of that is part of faith
It is reported on the authority of Abu Huraira that the Messenger of Allah (ﷺ) observed:
He who believes in Allah and the Last Day does not harm is neighbour, and he who believes in Allah and the Last Day shows hospitality to his guest and he who believes in Allah and the Last Day speaks good or remains silent.
Reference: Sahih Muslim 47 b In-book : Book 1, Hadith 81 USC-MSA web (English) : Book 1, Hadith 76 (deprecated)
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