Hazrat Abu Huraira, Allah be pleased with him, narrates that the Holy Prophet Muhammad, peace and blessings of Allah be upon him, said, “He who believes in Allah and the Last Day should either utter good words or observe silence; and he who believes in Allah and the Last Day should treat his neighbour with kindness and he who believes in Allah and the Last Day should show hospitality to his guest.”

(Sahih al-Muslim, Kitab al-Iman)

source:

http://www.alhakam.org/honour-ones-neighbour-and-guest