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
Anas b. Malik reported that when Allah's Messenger (ﷺ) had completed his dawn prayer, the servants of Medina came to him with utensils containing water, and no utensil was brought in which he did not dip his hand; and sometime they came in the cold dawn (and he did not feel reluctant in acceding to their request even in the cold weather) and dipped his hand in them.
Reference: Sahih Muslim 2324 In-book : Book 43, Hadith 100 USC-MSA web (English) : Book 30, Hadith 5749 (deprecated)
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