The Messenger of Allah ﷺ said, "Whoever believes in Allah and the Last Day should speak good or remain silent."
حدثنا أبو بكر حدثنا أبو الأحوص عن أبي حصين عن أبي صالح
قال رسول الله ﷺ من كان يؤمن بالله واليوم الآخر فليقل خيرا أو ليسكت
Bukhari, Adab, chapter on whoever believes in Allah and the Last Day should not harm his neighbor, hadith 6018, from the hadith of Abu Ahwas through this chain, and Muslim, Iman, chapter on encouraging generosity to one's neighbor and guest, 6018, etc., hadith 75/47, from Abu Bakr bin Abu Shayba through this chain.