Hadith:
وعن أَبي هريرة أنَّ النبي قَالَ : « مَنْ كَانَ يُؤْمِنُ بِاللهِ وَاليَوْمِ الآخِرِ فَلْيُكْرِمْ ضَيْفَهُ ، وَمَنْ كَانَ يُؤْمِنُ بِاللهِ وَاليَومِ الآخِرِ ، فَلْيَصِلْ رَحِمَهُ ، وَمَنْ كَانَ يُؤْمِنُ بِاللهِ وَاليَومِ الآخِرِ ، فَلْيَقُلْ خَيْراً أَوْ لِيَصْمُتْ » . متفقٌ عَلَيْهِ
Translation:
Abu Hurairah (May Allah be pleased with him) reported: The Prophet (saws) said, "He who believes in Allah and the Last Day, let him show hospitality to his guest; and he who believes in Allah and the Last Day, let him maintain good relation with kins; and he who believes in Allah and the Last Day, let him speak good or remain silent." [Al-Bukhari and Muslim].
Explanation:
To honour a guest means to welcome him cheerfully, entertain him happily according to our capacity and have full regard of his comfort and rest. As for our relatives, we are supposed to treat them nicely and to do our duty towards them. Reserve in speech implies that we should avoid senseless and irrelevant talk. We are apt to pass most of our time in the remembrance of Allah, seeking His forgiveness and saying what is good to everybody. Or we had better keep silent. These three qualities are possessed by those people who believe in Allah and the Day of Reckoning. In other words, those who lack these qualities betray only a weak and imperfect Faith.