Abu Mijlaz (may Allah have mercy on him) said: A man sat down in the middle of the gathering, so Sayyiduna Hudhayfah (may Allah be pleased with him) said: "He is cursed upon the tongue of Muhammad (peace and blessings be upon him)," or he said: "The Messenger of Allah (peace and blessings be upon him) cursed the one who sits in the middle of the gathering."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الجمعة / 5909