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
وَحَدَّثَنِي مُحَمَّدُ بْنُ أَحْمَدَ بْنِ أَبِي خَلَفٍ، حَدَّثَنَا رَوْحٌ، حَدَّثَنَا أَبُو مَالِكٍ، عُبَيْدُ اللَّهِ بْنُ الأَخْنَسِ أَخْبَرَنِي نَافِعٌ، عَنْ عَبْدِ اللَّهِ بْنِ عُمَرَ، - رضى الله عنهما - قَالَ ذُكِرَ عِنْدَ النَّبِيِّ صلى الله عليه وسلم صَوْمُ يَوْمِ عَاشُورَاءَ . فَذَكَرَ مِثْلَ حَدِيثِ اللَّيْثِ بْنِ سَعْدٍ سَوَاءً .
Abdullah b. Umar (Allah be pleased with them) reported that the day of 'Ashura was mentioned before the Messenger of Allah (ﷺ) and he narrated a hadith like one (narrated above).
Reference: Sahih Muslim 1126 e In-book : Book 13, Hadith 152 USC-MSA web (English) : Book 6, Hadith 2508 (deprecated)
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