The Prophet ﷺ said, "Whoever believes in Allah and the Last Day, let him honor his guest. Whoever believes in Allah and the Last Day, let him not harm his neighbor. And whoever believes in Allah and the Last Day, let him speak good or remain silent."
حدثنا عبد الرحمن عن سفيان عن أبي حصين عن أبي صالح
عن النبي ﷺ قال من كان يؤمن بالله واليوم الآخر فليكرم ضيفه ومن كان يؤمن بالله واليوم الآخر فلا يؤذ جاره ومن كان يؤمن بالله واليوم الآخر فليقل خيرا أو ليسكت
Its chain of transmission is sahih. It is found in Bukhari 8/125, in the book of Riqaq, chapter on guarding the tongue. See also 6595.