It is narrated from a Companion (may Allah be pleased with him) that he heard the Noble Prophet (peace and blessings be upon him) say: Whoever believes in Allah and the Last Day should fear Allah and honor his guest; and whoever believes in Allah and the Last Day should fear Allah and treat his neighbor well; and whoever believes in Allah and the Last Day should fear Allah and speak good words or else remain silent.
Hadith Referenceمسند احمد / مسند الأنصار رضي الله عنهم / 23496