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
A'isha reported that when Allah's Messenger (ﷺ) came to visit any sick he supplicated for him and said:
Lord of the people, remove the malady, cure him for You are a great Curer. There is no cure but through Your healing Power which leaves no trouble, and in the narration transmitted on the authority of Abu Bakr there is a slight variation of wording.
Reference: Sahih Muslim 2191 d In-book : Book 39, Hadith 64 USC-MSA web (English) : Book 26, Hadith 5435 (deprecated)
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