Abu Yahya narrates: I was present there; Sayyiduna Imam al-Hasan (may Allah be pleased with him), Sayyiduna Imam al-Husayn (may Allah be pleased with him) and Marwan were present. There was a bitter exchange of words between Sayyiduna Imam al-Husayn (may Allah be pleased with him) and Marwan, and Sayyiduna Imam al-Hasan (may Allah be pleased with him) was trying to quieten Sayyiduna Imam al-Husayn (may Allah be pleased with him). Meanwhile Marwan said: The Ahl al-Bayt are accursed (we seek refuge in Allah from that). Sayyiduna Imam al-Hasan (may Allah be pleased with him) became angry and said: You say that the Ahl al-Bayt are accursed? By Allah, Allah Almighty cursed you while you were still in your father's loins.
Al-Tabarani recorded it; its chain contains Ata' bin al-Sa'ib, whose memory became confused (ikhtilat).
(Allamah al-Haythami says:) I say: Before this, at the end of the Book of Faith, some hadiths have passed about hypocrisy, the hypocrites and their names.
Hadith Referenceمجمع الزوائد ومنبع الفوائد / كتاب المناقب / 16741