Abu Hurairah reported the Messenger of Allah (May peace be upon him) as saying: He who believes in Allah and in the last day should honour his guest; he who believes in Allah and in the last day should not harm his neighbor; he who believes in Allah and in the last day should speak good or keep silence
SahihSahihSahih Bukhari (6138) Sahih Muslim (47)Book 43 · Hadith 382