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 narrated on the authority of Abu Shuraih al-Khuzai' that the Prophet (ﷺ) observed:
He who believes in Allah and the Last Day should do good to his neighbour and he who believes in Allah and the Last Day should show hospitality to the guest and he who believes in Allah and the Last Day should either speak good or better remain silent.
Reference: Sahih Muslim 48 In-book : Book 1, Hadith 83 USC-MSA web (English) : Book 1, Hadith 78 (deprecated)
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