The Prophet ﷺ said, "Whoever believes in Allah and the Last Day, let him treat his neighbor well. Whoever believes in Allah and the Last Day, let him honor his guest. And whoever believes in Allah and the Last Day, let him speak good or remain silent."
حدثنا أبو بكر بن أبي شيبة حدثنا سفيان بن عيينة عن عمرو بن دينار سمع نافع بن جبير يخبر
أن النبي ﷺ قال من كان يؤمن بالله واليوم الآخر فليحسن إلى جاره ومن كان يؤمن بالله واليوم الآخر فليكرم ضيفه ومن كان يؤمن بالله واليوم الآخر فليقل خيرا أو ليسكت
Sourcing, sahih. Muslim narrated it, in the Book of Faith, chapter on urging honor of the neighbor and the guest and maintaining silence except for good, etc., hadith 77/48, from the hadith of Sufyan, through this chain. Bukhari also narrated it, from the hadith of Saeed Maqburi from Abu Shurayh, through this chain, hadith 6019, 6135, 6476.