Sayyiduna Abdullah bin Amr (may Allah be pleased with him) narrates this saying of the Prophet (peace and blessings be upon him): "Whoever believes in Allah Almighty and the Last Day should honour his guest; and whoever believes in Allah Almighty and the Last Day should protect his neighbour; and whoever believes in Allah Almighty and the Last Day should speak good or else remain silent."
Ahmad and al-Tabarani recorded it, and the chains of both are hasan (good). (Al-Haythami says:) I say: The remaining hadiths on this subject will come in the chapter on hospitality.